Quote Originally Posted by xman01 View Post
im surprised with 4gb ram and never used x64 os before
That is not very uncommon at all to be honest. Many people either upgrade an existing XP system or upgrade their hardware but maintain their OS. This and the fact that kits are 2x2gb and 2x3gb standard now for all current platforms.

@SEREUPIN80

As far as your issue, I'm with the others in pointing the figure at your memory. You might have to play around with your timings / clocks and possibly voltage.