Setelah beberapa minggu yang lalu AMD Ati Radeon mengeluarkan seri kartu grafis high end , minggu ini AMD Ati Radeon kembali meluncurkan dua seri kartu grafis untuk kelas menengah. AMD mulai gencar memasarkan kartu grafis dengan chipset 40nm yang lebih hemat daya dibandingkan kelas kartu grafis dengan chipset 55 nm. Kartu grafis ini masih menggunakan chipset yang diberi nama “Juniper”, sama dengan Ati Radeon HD 5850 dan Ati Radeon HD 5870, hanya saja menggunakan bandwidth memori 128 bit. Spesikasi detail dibandingkan dengan seri sebelumnya kurang lebih sebagai berikut:
Type
ATI Radeon HD 5870:
Stream Processors=1600; Texture Units=80; ROPs=32; Core Clock=850MHz; Memory Clock=1.2GHz (4.8GHz data rate) GDDR5; Memory Bus Width=256-bit; Frame Buffer=1GB; Transistor Count=2.15B; TDP=188W; Manufacturing Process=TSMC 40nm; Price=$425
ATI Radeon HD 5850:
Stream Processors=1440; Texture Units=72; ROPs=32; Core Clock=725MHz; Memory Clock=1GHz (4GHz data rate) GDDR5; Memory Bus Width=256-bit; Frame Buffer=1GB; Transistor Count=2.15B; TDP=151W; Manufacturing Process=TSMC 40nm; Price=$305
ATI Radeon HD 5770:
Stream Processors=800; Texture Units=40; ROPs=16; Core Clock=850MHz; Memory Clock=1.2GHz (4.8GHz data rate) GDDR5; Memory Bus Width=128-bit; Frame Buffer=1GB; Transistor Count=1.04B; TDP=108W; Manufacturing Process=TSMC 40nm; Price=$200
ATI Radeon HD 5750:
Stream Processors=720; Texture Units=36; ROPs=16; Core Clock=700MHz; Memory Clock=1.15GHz (4.6GHz data rate) GDDR5; Memory Bus Width=128-bit; Frame Buffer=1GB/512MB; Transistor Count=1.04B; TDP=86W; Manufacturing Process=TSMC 40nm; Price=$170/$150
Dari spesifikasi diatas terlihat bahwa seri Ati HD 5750 dan Ati HD 5770 mempunyai memory clock yang lebih kencang dari seri Ati HD 5850, akan tetapi dengan badwidth yang lebih rendah (128 bit), performa yang dicapai tetap lebih rendah dari seri Ati HD 5850. Performa kartu grafis terbaru dari AMD Ati ini dibandingkan dengan kartu grafis AMD Ati seri sebelumnya ,dan hasil perbandingan Nvidia Geforce kurang lebih sebagai berikut:
Benchmark Score:
ATI Radeon HD 5770:
3DMark Vantage FULL HD Res=4354; HAWK FULL HD Res(FPS) 4AA/16AF=56; RESIDENT EVIL 5 FULL HD Res(FPS) 4AA/16AF=64; BATMAN FULL HD Res(FPS) NO AA=94
ATI Radeon HD 5750:
3DMark Vantage FULL HD Res=3450; HAWK FULL HD Res(FPS) 4AA/16AF=49; RESIDENT EVIL 5 FULL HD Res(FPS) 4AA/16AF=55; BATMAN FULL HD Res(FPS) NO AA=81
ATI Radeon HD 4870:
3DMark Vantage FULL HD Res=4142; HAWK FULL HD Res(FPS) 4AA/16AF=69; RESIDENT EVIL 5 FULL HD Res(FPS) 4AA/16AF=67; BATMAN FULL HD Res(FPS) NO AA=108
ATI Radeon HD 4850:
3DMark Vantage FULL HD Res=3320; HAWK FULL HD Res(FPS) 4AA/16AF=45; RESIDENT EVIL 5 FULL HD Res(FPS) 4AA/16AF=50; BATMAN FULL HD Res(FPS) NO AA=78
Nvidia Geforce GTS 250:
3DMark Vantage FULL HD Res=3150; HAWK FULL HD Res(FPS) 4AA/16AF=44; RESIDENT EVIL 5 FULL HD Res(FPS) 4AA/16AF=54; BATMAN FULL HD Res(FPS) NO AA=88
Nvidia Geforce GTX 260:
3DMark Vantage FULL HD Res=4570; HAWK FULL HD Res(FPS) 4AA/16AF=52; RESIDENT EVIL 5 FULL HD Res(FPS) 4AA/16AF=67; BATMAN FULL HD Res(FPS) NO AA=106
Dari pengujian yang dilakukan , kartu grafis AMD Ati Radeon seri HD 4870 masih mempunyai nilai yang lebih tinggi dibandingkan dengan seri AMD Ati Radeon HD 5770 untuk pengujian performa gaming (real -benchmark). Hal ini wajar terjadi karena lebar bandwidth yang dipunyai AMD Ati Radeon HD 5770 adalah 128 bit, dibandingkan dengan AMD Ati RadeonHD 4870 yang mempunyai lebar bandwidth 256 bit. Sedangkan untuk nilai pengujian sintesis dengan 3DMark, nilai score yang diperoleh lebih tinggi daripada AMD Ati Radeon HD 4870 dan lebih rendah dari Nvidia Gefore GTX 260 216 SP. Nilai plus AMD Ati Radeon HD 5770 adalah dari sisi teknologi jelas AMD Ati Radeon HD 5770 lebih baru (chip 40 nm), support Microsoft DirectX 11 (Windows 7), dan lebih unggul dalam konsumsi daya sesuai dengan teknologi yang disebut sebagai “Evergreen”. Teknologi “Evergreen” memberikan pengaruh pada temperatur suhu kartu grafis ketika sedang “idle” maupun kondisi beban puncak “full load”, selain itu kemungkinan untuk dilakukan overcloking juga lebih besar.
Kartu grafis AMD Ati Radeon HD 5750 dan AMD Ati Radeon HD 5770 mempunyai output port baru yang disebut sebagai “Display Port”. Display port ini merupakan output kartu grafis masa depan yang hampir sama dengan port HDMI, output dalam bentuk gambar dan suara dalam satu kesatuan kabel saja. Di masa depan diharapkan koneksi dengan kabel jenis ini kualitas high definition audio maupun video dapat lebih baik.
Untuk mendapatkan performa yang lebih sempurna, anda bisa mendapatkan driver terbaru untuk seri kartu grafis ini di:
Windows Vista/Windows7: http://www2.ati.com/drivers/RadeonHD_5800_5700_Catalyst_Vista_Win7.exe
Windows XP :
http://www2.ati.com/drivers/9-9_xp32_dd_ccc_wdm_enu.exe
Quadra Jakal Komputer Jogja
Widayana Kurniawan
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hits4pay
Nov 2, 2009
ATI RADEON HD 5750 dan ATI RADEON HD 5770
Dec 13, 2008
10 reasons why PCs crash U must Know
Fatal error: the system has become unstable or is busy," it says. "Enter to return to Windows or press Control-Alt-Delete to restart your computer. If you do this you will lose any unsaved information in all open applications."
You have just been struck by the Blue Screen of Death. Anyone who uses Mcft Windows will be familiar with this. What can you do? More importantly, how can you prevent it happening?
1 Hardware conflict
The number one reason why Windows crashes is hardware conflict. Each hardware device communicates to other devices through an interrupt request channel (IRQ). These are supposed to be unique for each device.
For example, a printer usually connects internally on IRQ 7. The keyboard usually uses IRQ 1 and the floppy disk drive IRQ 6. Each device will try to hog a single IRQ for itself.
If there are a lot of devices, or if they are not installed properly, two of them may end up sharing the same IRQ number. When the user tries to use both devices at the same time, a crash can happen. The way to check if your computer has a hardware conflict is through the following route:
* Start-Settings-Control Panel-System-Device Manager.
Often if a device has a problem a yellow '!' appears next to its description in the Device Manager. Highlight Computer (in the Device Manager) and press Properties to see the IRQ numbers used by your computer. If the IRQ number appears twice, two devices may be using it.
Sometimes a device might share an IRQ with something described as 'IRQ holder for PCI steering'. This can be ignored. The best way to fix this problem is to remove the problem device and reinstall it.
Sometimes you may have to find more recent drivers on the internet to make the device function properly. A good resource is www.driverguide.com. If the device is a soundcard, or a modem, it can often be fixed by moving it to a different slot on the motherboard (be careful about opening your computer, as you may void the warranty).
When working inside a computer you should switch it off, unplug the mains lead and touch an unpainted metal surface to discharge any static electricity.
To be fair to Mcft, the problem with IRQ numbers is not of its making. It is a legacy problem going back to the first PC designs using the IBM 8086 chip. Initially there were only eight IRQs. Today there are 16 IRQs in a PC. It is easy to run out of them. There are plans to increase the number of IRQs in future designs.
2 Bad Ram
Ram (random-access memory) problems might bring on the blue screen of death with a message saying Fatal Exception Error. A fatal error indicates a serious hardware problem. Sometimes it may mean a part is damaged and will need replacing.
But a fatal error caused by Ram might be caused by a mismatch of chips. For example, mixing 70-nanosecond (70ns) Ram with 60ns Ram will usually force the computer to run all the Ram at the slower speed. This will often crash the machine if the Ram is overworked.
One way around this problem is to enter the BIOS settings and increase the wait state of the Ram. This can make it more stable. Another way to troubleshoot a suspected Ram problem is to rearrange the Ram chips on the motherboard, or take some of them out. Then try to repeat the circumstances that caused the crash. When handling Ram try not to touch the gold connections, as they can be easily damaged.
Parity error messages also refer to Ram. Modern Ram chips are either parity (ECC) or non parity (non-ECC). It is best not to mix the two types, as this can be a cause of trouble.
EMM386 error messages refer to memory problems but may not be connected to bad Ram. This may be due to free memory problems often linked to old Dos-based programmes.
3 BIOS settings
Every motherboard is supplied with a range of chipset settings that are decided in the factory. A common way to access these settings is to press the F2 or delete button during the first few seconds of a boot-up.
Once inside the BIOS, great care should be taken. It is a good idea to write down on a piece of paper all the settings that appear on the screen. That way, if you change something and the computer becomes more unstable, you will know what settings to revert to.
A common BIOS error concerns the CAS latency. This refers to the Ram. Older EDO (extended data out) Ram has a CAS latency of 3. Newer SDRam has a CAS latency of 2. Setting the wrong figure can cause the Ram to lock up and freeze the computer's display.
Mcft Windows is better at allocating IRQ numbers than any BIOS. If possible set the IRQ numbers to Auto in the BIOS. This will allow Windows to allocate the IRQ numbers (make sure the BIOS setting for Plug and Play OS is switched to 'yes' to allow Windows to do this.).
4 Hard disk drives
After a few weeks, the information on a hard disk drive starts to become piecemeal or fragmented. It is a good idea to defragment the hard disk every week or so, to prevent the disk from causing a screen freeze. Go to
* Start-Programs-Accessories-System Tools-Disk Defragmenter
This will start the procedure. You will be unable to write data to the hard drive (to save it) while the disk is defragmenting, so it is a good idea to schedule the procedure for a period of inactivity using the Task Scheduler.
The Task Scheduler should be one of the small icons on the bottom right of the Windows opening page (the desktop).
Some lockups and screen freezes caused by hard disk problems can be solved by reducing the read-ahead optimisation. This can be adjusted by going to
* Start-Settings-Control Panel-System Icon-Performance-File System-Hard Disk.
Hard disks will slow down and crash if they are too full. Do some housekeeping on your hard drive every few months and free some space on it. Open the Windows folder on the C drive and find the Temporary Internet Files folder. Deleting the contents (not the folder) can free a lot of space.
Empty the Recycle Bin every week to free more space. Hard disk drives should be scanned every week for errors or bad sectors. Go to
* Start-Programs-Accessories-System Tools-ScanDisk
Otherwise assign the Task Scheduler to perform this operation at night when the computer is not in use.
5 Fatal OE exceptions and VXD errors
Fatal OE exception errors and VXD errors are often caused by video card problems.
These can often be resolved easily by reducing the resolution of the video display. Go to
* Start-Settings-Control Panel-Display-Settings
Here you should slide the screen area bar to the left. Take a look at the colour settings on the left of that window. For most desktops, high colour 16-bit depth is adequate.
If the screen freezes or you experience system lockups it might be due to the video card. Make sure it does not have a hardware conflict. Go to
* Start-Settings-Control Panel-System-Device Manager
Here, select the + beside Display Adapter. A line of text describing your video card should appear. Select it (make it blue) and press properties. Then select Resources and select each line in the window. Look for a message that says No Conflicts.
If you have video card hardware conflict, you will see it here. Be careful at this point and make a note of everything you do in case you make things worse.
The way to resolve a hardware conflict is to uncheck the Use Automatic Settings box and hit the Change Settings button. You are searching for a setting that will display a No Conflicts message.
Another useful way to resolve video problems is to go to
* Start-Settings-Control Panel-System-Performance-Graphics
Here you should move the Hardware Acceleration slider to the left. As ever, the most common cause of problems relating to graphics cards is old or faulty drivers (a driver is a small piece of software used by a computer to communicate with a device).
Look up your video card's manufacturer on the internet and search for the most recent drivers for it.
6 Viruses
Often the first sign of a virus infection is instability. Some viruses erase the boot sector of a hard drive, making it impossible to start. This is why it is a good idea to create a Windows start-up disk. Go to
* Start-Settings-Control Panel-Add/Remove Programs
Here, look for the Start Up Disk tab. Virus protection requires constant vigilance.
A virus scanner requires a list of virus signatures in order to be able to identify viruses. These signatures are stored in a DAT file. DAT files should be updated weekly from the website of your antivirus software manufacturer.
An excellent antivirus programme is McAfee VirusScan by Network Associates ( www.nai.com). Another is Norton AntiVirus 2000, made by Symantec ( www.symantec.com).
7 Printers
The action of sending a document to print creates a bigger file, often called a postscript file.
Printers have only a small amount of memory, called a buffer. This can be easily overloaded. Printing a document also uses a considerable amount of CPU power. This will also slow down the computer's performance.
If the printer is trying to print unusual characters, these might not be recognised, and can crash the computer. Sometimes printers will not recover from a crash because of confusion in the buffer. A good way to clear the buffer is to unplug the printer for ten seconds. Booting up from a powerless state, also called a cold boot, will restore the printer's default settings and you may be able to carry on.
8 Software
A common cause of computer crash is faulty or badly-installed software. Often the problem can be cured by uninstalling the software and then reinstalling it. Use Norton Uninstall or Uninstall Shield to remove an application from your system properly. This will also remove references to the programme in the System Registry and leaves the way clear for a completely fresh copy.
The System Registry can be corrupted by old references to obsolete software that you thought was uninstalled. Use Reg Cleaner by Jouni Vuorio to clean up the System Registry and remove obsolete entries. It works on Windows 95, Windows 98, Windows 98 SE (Second Edition), Windows Millennium Edition (ME), NT4 and Windows 2000.
Read the instructions and use it carefully so you don't do permanent damage to the Registry. If the Registry is damaged you will have to reinstall your operating system. Reg Cleaner can be obtained from www.jv16.org
Often a Windows problem can be resolved by entering Safe Mode. This can be done during start-up. When you see the message "Starting Windows" press F4. This should take you into Safe Mode.
Safe Mode loads a minimum of drivers. It allows you to find and fix problems that prevent Windows from loading properly.
Sometimes installing Windows is difficult because of unsuitable BIOS settings. If you keep getting SUWIN error messages (Windows setup) during the Windows installation, then try entering the BIOS and disabling the CPU internal cache. Try to disable the Level 2 (L2) cache if that doesn't work.
Remember to restore all the BIOS settings back to their former settings following installation.
9 Overheating
Central processing units (CPUs) are usually equipped with fans to keep them cool. If the fan fails or if the CPU gets old it may start to overheat and generate a particular kind of error called a kernel error. This is a common problem in chips that have been overclocked to operate at higher speeds than they are supposed to.
One remedy is to get a bigger better fan and install it on top of the CPU. Specialist cooling fans/heatsinks are available from www.computernerd.com or www.coolit.com
CPU problems can often be fixed by disabling the CPU internal cache in the BIOS. This will make the machine run more slowly, but it should also be more stable.
10 Power supply problems
With all the new construction going on around the country the steady supply of electricity has become disrupted. A power surge or spike can crash a computer as easily as a power cut.
If this has become a nuisance for you then consider buying a uninterrupted power supply (UPS). This will give you a clean power supply when there is electricity, and it will give you a few minutes to perform a controlled shutdown in case of a power cut.
It is a good investment if your data are critical, because a power cut will cause any unsaved data to be lost.
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8 People Can Use The Same Msn Dial Up Account
its easy really. want to have an entire family on dial-up with just one bill?
step one. purchase 20 dollar a month subscription to MSN unlimited access dial up. This will include an MSN 9 cd which you will need. With the software installed, fill up your secondary account slots with new users. Make sure you pick @msn if it gives you the choice, hotmail email addresses will not work..
say the secondary account is johnsmith@msn.com type in the Dial up connection
USER : MSN/johnsmith
PASS: ******* (whatever)
connect to your local msn phone number and the other people you gave secondary accounts to will be able to do the same, while you are connected. Its a sweet deal considering everyone is paying about 2 bucks a month for internet access, especially if you cannot get broadband. if you wanted to sell off the access to people you could actually make money doing this.. but i do not suggest it.
I used to be an msn tech and this was a little known secret even to most of the employees.
After you do this you do not need the software any more. I would suggest keeping it on to micromanage everyone else's accounts. and for the simple fact that if they don't pitch in, cut them off HEHEHE
i'm on broadband now so i dont care if i tell you my little secret. anyone else knew of this?
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Apr 22, 2008
100 KEYBOARD SHORTCUTS FOR WIN XP
CTRL+C (Copy)
CTRL+X (Cut)
CTRL+V (Paste)
CTRL+Z (Undo)
DELETE (Delete)
SHIFT+DELETE (Delete the selected item permanently without placing the item in the Recycle Bin)
CTRL while dragging an item (Copy the selected item)
CTRL+SHIFT while dragging an item (Create a shortcut to the selected item)
F2 key (Rename the selected item)
CTRL+RIGHT ARROW (Move the insertion point to the beginning of the next word)
CTRL+LEFT ARROW (Move the insertion point to the beginning of the previous word)
CTRL+DOWN ARROW (Move the insertion point to the beginning of the next paragraph)
CTRL+UP ARROW (Move the insertion point to the beginning of the previous paragraph)
CTRL+SHIFT with any of the arrow keys (Highlight a block of text)
SHIFT with any of the arrow keys (Select more than one item in a window or on the desktop, or select text in a document)
CTRL+A (Select all)
F3 key (Search for a file or a folder)
ALT+ENTER (View the properties for the selected item)
ALT+F4 (Close the active item, or quit the active program)
ALT+ENTER (Display the properties of the selected object)
ALT+SPACEBAR (Open the shortcut menu for the active window)
CTRL+F4 (Close the active document in programs that enable you to have multiple documents open simultaneously)
ALT+TAB (Switch between the open items)
ALT+ESC (Cycle through items in the order that they had been opened)
F6 key (Cycle through the screen elements in a window or on the desktop)
F4 key (Display the Address bar list in My Computer or Windows Explorer)
SHIFT+F10 (Display the shortcut menu for the selected item)
ALT+SPACEBAR (Display the System menu for the active window)
CTRL+ESC (Display the Start menu)
ALT+ Underlined letter in a menu name (Display the corresponding menu)
Underlined letter in a command name on an open menu (Perform the corresponding command)
F10 key (Activate the menu bar in the active program)
RIGHT ARROW (Open the next menu to the right, or open a submenu)
LEFT ARROW (Open the next menu to the left, or close a submenu)
F5 key (Update the active window)
BACKSPACE (View the folder one level up in My Computer or Windows Explorer)
ESC (Cancel the current task)
SHIFT when you insert a CD-ROM into the CD-ROM drive (Prevent the CD-ROM from automatically playing)
Dialog Box Keyboard Shortcuts
CTRL+TAB (Move forward through the tabs)
CTRL+SHIFT+TAB (Move backward through the tabs)
TAB (Move forward through the options)
SHIFT+TAB (Move backward through the options)
ALT+Underlined letter (Perform the corresponding command or select the corresponding option)
ENTER (Perform the command for the active option or button)
SPACEBAR (Select or clear the check box if the active option is a check box)
Arrow keys (Select a button if the active option is a group of option buttons)
F1 key (Display Help)
F4 key (Display the items in the active list)
BACKSPACE (Open a folder one level up if a folder is selected in the Save As or Open dialog box)
MICROSOFT Natural Keyboard Shortcuts
Windows Logo (Display or hide the Start menu)
Windows Logo+BREAK (Display the System Properties dialog box)
Windows Logo+D (Display the desktop)
Windows Logo+M (Minimize all of the windows)
Windows Logo+SHIFT+M (Restore the minimized windows)
Windows Logo+E (Open My Computer)
Windows Logo+F (Search for a file or a folder)
CTRL+Windows Logo+F (Search for computers)
Windows Logo+F1 (Display Windows Help)
Windows Logo+ L (Lock the keyboard)
Windows Logo+R (Open the Run dialog box)
Windows Logo+U (Open Utility Manager)
Accessibility Keyboard Shortcuts
>Right SHIFT for eight seconds (Switch Filter Keys either on or off)
Left ALT+left SHIFT+PRINT SCREEN (Switch High Contrast either on or off)
Left ALT+left SHIFT+NUM LOCK (Switch the MouseKeys either on or off)
SHIFT five times (Switch the Sticky Keys either on or off)
NUM LOCK for five seconds (Switch the Toggle Keys either on or off)
Windows Logo +U (Open Utility Manager)
Windows Explorer Keyboard Shortcuts
END (Display the bottom of the active window)
HOME (Display the top of the active window)
NUM LOCK + Asterisk sign (*) (Display all of the subfolders that are under the selected folder)
NUM LOCK + Plus sign (+) (Display the contents of the selected folder)
NUM LOCK + Minus sign (-) (Collapse the selected folder)
LEFT ARROW (Collapse the current selection if it is expanded, or select the parent folder)
RIGHT ARROW (Display the current selection if it is collapsed, or select the first subfolder)
Shortcut Keys for Character Map
After you double-click a character on the grid of characters, you can move through the grid by using the keyboard shortcuts:
RIGHT ARROW (Move to the right or to the beginning of the next line)
LEFT ARROW (Move to the left or to the end of the previous line)
UP ARROW (Move up one row)
DOWN ARROW (Move down one row)
PAGE UP (Move up one screen at a time)
PAGE DOWN (Move down one screen at a time)
HOME (Move to the beginning of the line)
END (Move to the end of the line)
CTRL+HOME (Move to the first character)
CTRL+END (Move to the last character)
SPACEBAR (Switch between Enlarged and Normal mode when a character is selected)
m*cro$oft Management Console (MMC) Main Window Keyboard Shortcuts
CTRL+O (Open a saved console)
CTRL+N (Open a new console)
CTRL+S (Save the open console)
CTRL+M (Add or remove a console item)
CTRL+W (Open a new window)
F5 key (Update the content of all console windows)
ALT+SPACEBAR (Display the MMC window menu)
ALT+F4 (Close the console)
ALT+A (Display the Action menu)
ALT+V (Display the View menu)
ALT+F (Display the File menu)
ALT+O (Display the Favorites menu)
MMC Console Window Keyboard Shortcuts
CTRL+P (Print the current page or active pane)
ALT+Minus sign (-) (Display the window menu for the active console window)
SHIFT+F10 (Display the Action shortcut menu for the selected item)
F1 key (Open the Help topic, if any, for the selected item)
F5 key (Update the content of all console windows)
CTRL+F10 (Maximize the active console window)
CTRL+F5 (Restore the active console window)
ALT+ENTER (Display the Properties dialog box, if any, for the selected item)
F2 key (Rename the selected item)
CTRL+F4 (Close the active console window. When a console has only one
console window, this shortcut closes the console)
Remote Desktop Connection Navigation
CTRL+ALT+END (Open the m*cro$oft Windows NT Security dialog box)
ALT+PAGE UP (Switch between programs from left to right)
ALT+PAGE DOWN (Switch between programs from right to left)
ALT+INSERT (Cycle through the programs in most recently used order)
ALT+HOME (Display the Start menu)
CTRL+ALT+BREAK (Switch the client computer between a window and a full screen)
ALT+DELETE (Display the Windows menu)
CTRL+ALT+Minus sign (-) (Place a snapshot of the active window in the client on the Terminal server clipboard and provide the same functionality as pressing PRINT SCREEN on a local computer.)
CTRL+ALT+Plus sign (+) (Place a snapshot of the entire client window area on the Terminal server clipboard and provide the same functionality as pressing ALT+PRINT SCREEN on a local computer.)
m*cro$oft Internet Explorer Navigation
CTRL+B (Open the Organize Favorites dialog box)
CTRL+E (Open the Search bar)
CTRL+F (Start the Find utility)
CTRL+H (Open the History bar)
CTRL+I (Open the Favorites bar)
CTRL+L (Open the Open dialog box)
CTRL+N (Start another instance of the browser with the same Web address)
CTRL+O (Open the Open dialog box, the same as CTRL+L)
CTRL+P (Open the Print dialog box)
CTRL+R (Update the current Web page)
CTRL+W (Close the current window)
Exercise your brain! Try Flexicon.
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Mar 27, 2008
[vaksin.com] Backup, Backup dan Backup
Pernah dengar Stem Cell? Jangan salah, ini masih situs sekuriti dan belum berubah jadi situs kedokteran :P. Stem Cell alias sel induk yang didapatkan dari tali pusar ketika bayi dilahirkan. Stem Cell ternyata memiliki kemampuan menakjubkan ini, sehingga jika si bayi ketika beranjak dewasa menghadapi berbagai penyakit berat seperti anemia, leukemia, thalasemia dan banyak penyakit berat lain akan tertolong dengan adanya Stem Cell ini.
Tetapi pertanyaannya bayi ajaib dari mana yang kurang kerjaan menyimpan sel induknya sendiri (yang hanya didapatkan pada tali pusat dia dilahirkan). Ternyata orang tua dan bukan si bayi itu yang menyimpan sel induk bayinya di Bank Darah Tali Pusat guna menjadi "Back up" si bayi ketika dia tumbuh dewasa nanti. Praktek bank darah tali pusat inilah yang mirip dengan satu kegiatan penting di dunia IT dan harusnya dihayati dan diamalkan sebaik-baiknya oleh Administrator sejati guna mengantisipasi kejadian yang tidak diinginkan atas data yang berada dibawah tanggungjawabnya. Ibarat kata pepatah gajah mati meninggalkan gading, harimau mati meninggalkan belang, admin (administrator komputer) pergi meninggalkan Backup :).
Backup tidak hanya berguna bagi perusahaan tempat administrator bekerja, tetapi backup juga berguna bagi pengguna komputer secara pribadi. Jika perusahaan membutuhkan backup atas data perusahaan seperti data transaksi, laporan keuangan, data pelanggan dan database lainnya maka perorangan pengguna komputer membutuhkan backup atas data-datanya yang penting seperti data skripsi / surat menyurat yang biasanya dalam format MS Office, data email (jika banyak melakukan korespondensi email). Backup ibarat asuransi, yang dapat menghemat waktu, biaya bahkan berfungsi layaknya seperti SDB (Safe deposit box) yang dapat menyimpan data anda yang berharga dan tidak tergantikan seperti foto pernikahan, foto dengan pacar lama (masa karena lupa backup dan fotonya terhapus harus pacaran lagi supaya bisa dapatkan foto dengan pacar lama? :P).
Data dapat hilang karena beberapa sebab, antara lain karena kerusakan hardware, human error (salah hapus, salah format dan lainnya), kerusakan software, virus dan bencana alam/force majeur.
System Restore
Jika anda pengguna Windows XP dan Vista, kedua sistem operasi (OS) ini memiliki fitur System Restore. System Restore berfungsi seperti mesin waktu yang mengembalikan sistem OS pada waktu terdahulu, dengan catatan System Restore telah diaktifkan terlebih dahulu (fitur ini diaktifkan secara default pada saat anda instal OS). Fitur ini sangat berguna untuk membantu jika terjadi instalasi aplikasi yang tidak anda inginkan atau tidak dapat anda hilangkan/ uninstal dengan sempurna sehingga menyebabkan masalah pada sistem komputer anda.
Adapun aplikasi yang tidak diinginkan tersebut antara lain adalah virus dan spyware, jadi jika anda tidak sengaja (sadar) menjalankan virus (mana ada orang yang secara sadar menjalankan virus di komputernya kecuali analis virus :P), maka salah satu cara yang cepat dan efektif untuk menghilangkan virus tersebut adalah menggunakan System Restore untuk mengembalikan komputer pada saat sebelum virus tersebut dijalankan.
Tetapi celakanya, beberapa virus lokal sudah cukup sadar akan fitur ini dan melakukan aksi menonaktifkan Sistem Restore setiap kali menginfeksi komputer. Satu catatan penting yang perlu anda ketahui adalah System Restore tidak membackup data anda dan hanya membackup sistem operasi sehingga anda harus tetap melakukan backup data penting anda secare teratur.
Selain itu, pada kasus virus yang sudah lama menginfeksi komputer System Restore ini malahan melindungi virus tersebut dan tidak dapat dibersihkan dengan sempurna dari komputer karena sudah diproteksi dalam Restore Point. Karena itu salah satu langkah standar dalam pembersihan virus adalah non aktifkan System Restore. Anda dapat mengkases System Restore pada Windows XP/Vista dari
[Start][All Programs][Accessories][System Tools][System Restore].
Backup Data Murah Meriah
Penulis sering mendapatkan pertanyaan, karena varian virus baru selalu bermunculan dan membutuhkan waktu untuk di deteksi antivirus sehingga pengguna komputer secara teknis selalu terancam oleh serangan virus baru, bagaimana cara melindungi komputer dari serangan tersebut sehingga data di komputer dapat aman? Jawabannya simple dan tidak mahal, dan bukan menggunakan antivirus atau aplikasi sekuriti lainlain. Melainkan Backup.... Backup... Backup. Backup adalah solusi yang murmer (murah meriah) dalam menghadapi ancaman kehilangan data.
Dan kabar baiknya, backup dapat melindungi pemilik data bukan hanya dari ancaman dihancurkan oleh virus tetapi juga dari ancaman lain seperti kerusakan hardware / harddisk maupun software seperti salah format (percayalah hal ini sering terjadi) atau terdelete. Atau ancaman lebih parah seperti pencurian, banjir, kebakaran ataupun forcemajeur lainnya. Mengatakan lebih mudah dari menjalankan, begitulah kata pepatah. Maslaah utama backup bukanlah pada kerumitan atau kesulitan menjalankan aplikasi backup TETAPI pada kedisiplinan melakukan backup data ini. Backup yang baik adalah backup yang dilakukan secara teratur pada media yang terpisah, terverifikasi dan terlindung dengan baik. Jika anda bekerja pada perushaan besar dengan database yang krusial kemungkinan anda sudah familiar dengan media backup yang mahal seperti tape backup, SAN server atau backup server lainnya.
Sekalipun sudah dilengkapi dengan media backup yang handal dan mahal, penulis pernah mengalami kasus dimana data yang dibackup secara teratur setiap hari pada tape backup ternyata tidak bisa direstore pada saat dibutuhkan, ternyata dukungan hardware backup mahal dan canggih tidak cukup jika proses verifikasi tidak dilakukan.
Untuk backup data personal, belajar dari pengalaman di atas, hardware dan media backup yang mahal atau canggih tidak menjadi syarat utama. Bahkan para pengguna komputer yang memiliki CD / DVD Writer sudah memiliki sarana media backup yang cukup handal dan ekonomis (hampir semua notebook baru sekarang minimal memiliki kemampuan CD Writer dan beberapa notebook high end memiliki kemampuan DVD Writer). Dengan CD R backup dapat dilakukan sampai dengan 400 MB dan dengan DVD R dapat melakukan backup data sampai dengan 4.7 GB per keping CD / DVD yang harganya berkisar dari Rp. 3.000,- s/d Rp. 10.000,- per keping. Perlu anda ketahui CD / DVD R memiliki karakteristik WORM Write Once Read Many, artinya anda dapat menulis data hanya 1 kali ke CD/DVD R dan tidak dapat dirubah-rubah lagi sebaliknya data tersebut dapat dibaca berulang-ulang.
Berbeda dengan harddisk yang dapat ditulis dan dibaca berulang-ulang. Sebenarnya karakteristik WORM ini memiliki keunggulan dimana data yang telah anda backup tidak dapat dihancurkan secara software, manfaat ini terasa ketika komputer anda terinfeksi virus yang berusaha merubah data MS Office komputer korbannya, data di harddisk akan berhasil dirubah oleh virus namun dijamin data anda di CD/DVD R tidak akan mampu di delete oleh virus (asalkan anda jangan membackup data bervirus yang akan menjadikan virus tersebut tidak dapat dibersihkan dan satu-satunya cara menghancurkan virus di CD/DVD R adalah dengan menghancurkan keping CD/DVD tersebut). Jika anda ingin keping CD/DVD yang memiliki fleksibilitas seperti harddisk anda dapat memilih menggunakan CD / DVD RW.
Backup Data Murah Meriah (lebih) murah meriah
Apakah backup dengan CD/DVD merupakan solusi murah dan aman apakah ada solusi lain? Dibandingkan dengan backup dengan harddisk atau flashdisk, backup dengan CD/DVD dapat dikatakan lebih aman karena sifat WORM (Write Once Read Many) tersebut dan jelas lebih murah jika dibandingkan dengan flashdisk. Jika anda memiliki koneksi internet broadband unlimited, ada satu perkembangan menarik dari internet yang seolah tidak berhenti memberikan kejutan, yaitu Online Backup. Coba anda jalan-jalan ke www.idrive.com
Jadi metode backup mana yang anda pilih ? Keputusan terserah kepada anda tetapi yang terpenting adalah ... Lakukan Sekarang !!!
Backup....bacuk....backup.
24 Maret 2008
http://vaksin.com/2008/0308/Backup.html
Salam,
Aa Tan
info@vaksin.com
PT. Vaksincom
Jl. Tanah Abang III/19E
Jakarta 10160
Ph : 021 345 6850
Fx : 021 345 6851
What Is Jakarta Struts?
Jakarta Struts is incredibly useful in helping you create excellent Web applications. When you use Jakarta Struts, your applications should work more effectively and have fewer bugs. Just as important (because your time is important), Struts should save you hours and hours of programming and debugging.
As we explain more fully later in this chapter, Struts is a framework that structures all the components of a Java-based Web application into a unified whole. These components of a Web application are:
- Java Servlets: Programs written in Java that reside on a Web server and respond to user requests
- JavaServer Pages: A technology for generating Web pages with both static and dynamic content
- JavaBeans: Components that follow specific rules, such as naming conventions
- Business logic: The code that implements the functionality or rules of your specific application.
We provide an overview of the first three items in this chapter. (The business
logic varies with each application.)
Jakarta Struts uses a specific paradigm, or design pattern, to structure your application. You simply fill in the pieces of the structure. The design pattern is called Model-View-Controller (MVC). The MVC design pattern helps you organize the various pieces of the application puzzle for maximum efficiency and flexibility.
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First of all, a blog is a Web site. Don’t let anybody tell you that Web sites and Weblogs are different creatures. To be clear, though, a Weblog is a type of Web site. It follows, then, that all Weblogs are Web sites, but not all Web sites are Weblogs.
Note that a blog is a Web site, not an entry on that Web site. Some new bloggers say, “I wrote five blogs today.” Actually they wrote five entries in their blog.
So, what distinguishes a Weblog from other sites?
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Here is the crucial power of blogs: They make it easy to frequently add content to a Web site. Blog programs and ready-to-use blogging services cut out the laborious and technical traditional process of building a Web site and adding pages to it. Consider what a site owner needed to do before blogs were available:
1. To create a single Web page, a site owner had to gain some familiarity with HTML (hypertext markup language, the underlying code of all Web sites). The choice was to write out the code by hand (fairly difficult) or use software that made page-creation a little more intuitive. Design skills
were needed and the software could be expensive. Ready-made templates eased the pain somewhat, but building a single page the old way was never as easy as blogging.
2. After creating a single-page, old-style site, the owner had to get it up on the Web. Usually, this meant using an internet system called FTP (file transfer protocol), which is somewhat like the My Computer program in Windows but operates across the space between two computers. Using FTP, the owner could upload newly created or altered pages to his or her site, which resided on an Internet computer. After the transfer, the new page became “live” and could be viewed by visitors to the site.
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