Tested on XP SP2...
Using the LargeSystemCache tweak means that effective transfer speeds of 1GB per second or more can be obtained, depending on the amount of RAM in your system and its operating speed. This is achieved because the LargeSystemCache modification causes the OS to store data in RAM after it is read from disk. It means that the OS is always using the optimum amount of RAM instead of leaving it untouched for future use that may or may not occur.
Some I/O intensive applications may take a hit in performance from changing the LargeSystemCache, so this particular component of the tweak should not be applied to a system that is running either SQL Server or Internet Information Server (IIS) because both of those applications perform their own caching.
Start regedit and navigate to the following key:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\ Control\Session Manager\Memory Management]
Add these two lines then save the changes and reboot:
"DisablePagingExecutive"=dword:00000001
"LargeSystemCache"=dword:00000001
To see the effects of this part of the tweak, launch a large, memory hungry application. Any of the Microsoft Office suite of applications will do that job nicely. Let the application load then exit from it. Fasten your safety harness then launch the application again.
I have just tested this with Photoshop CS3 which normally takes 13 seconds to load.
It loaded the second time in 4 seconds!
Also tested with Corel Photopaint X4, normally 15 seconds, now 3 seconds!
Needless to say I am impressed……
