it is possible to use full 4gb ram in win7 x86

wasim said:

i think better thing is that i use win7 x64 or wait and upgrade to new world of "windows 8" when it officially release

Actually the Intel 386 chip could use 48 bit addressing using the Segment Descriptor Table. Apparently nobody wanted to write the OS to take advantage of it. 4 GB seemed like a huge space then. Plus MS got the guys from DEC who did VMS, which used a flat 32 bit address space, to write NT. It was just easier to let them apply their experience rather than complicating things.

Corazon said:

if you have a bundled disc it contains both x64 and x86 copies on one disc

That is not correct. While Windows 7 DVDs do include every possible edition on one disc, they come as either 32-bit or 64-bit. Not both on one disc.

flemur13013 said:

Yes, it's possible to access 4Gig from 32 bit Win 7. I've been doing it for a while and never had any problems at all.
Find "4GB-RAMPatch-Multilingual-12.7.2010.exe" and run it.

That's a hack of unknown origin and while it may work, it runs inside the Windows kernel and with full privileges over the entire system. To trust something like this not to mess up your system is insane... It also violates licensing agreements with Microsoft.

I completely agree. I would rep you Corazon if allowed.