Windows 7 32 bit – 3.x GB RAM Limit

If you are running Windows 7 32 bit and have 4 GB of RAM you may have noticed that within the device manager, Windows notes:

Installed memory (RAM): 4.00 GB (3.24 GB usable).

In the 32 bit version of Windows 7 only 3.2 to 3.5 GB of RAM is usable by the operating system. By patching the kernel the RAM limit can be increased up to 64 GB. The 4GB-RAMPatch.exe is available here and removes this lock.

Note: Once you have patched your kernel I recommend running:

bcdedit /set {current} description "Windows 7 No RAM Lock"

This will change the German menu item (Windows 7 ohne DDR-RAM Sperre) to an English translation.

You can find out more at Unwave’s website.