BSOD 4gb ram - Works fine with 2gb

4gb ram bsod on startup or a few minutes later.

I tried every combination slots and sticks have no problems.
(2 slots, 2x 2gb sticks)

---Additionally, in the little time i had on 4gb ram boot i saw that only 2,94 gb memory is usable.


Is Windows 7 . . .
- x86 (32-bit) or x64 ?

x64

- the original installed OS on the system?

Yes

- an OEM or full retail version?

original equipment man.? Not done my me, but I had it done 3-4 times.

- What is the age of system (hardware)?

Not sure what this means. But motherboard of mine is quite old

- What is the age of OS installation (have you re-installed the OS?)

XP x86 to win 7 x86 to win 7 x64

Apologies for the bad English. I tried my best.
PS: Lack of grasp in your language may have made me look inexperienced,
but I'll probably understand what you will say.

Reposting because of opera had problem uploading file for some reason.