Memory problem

Hi everybody, hope i choose the right forum to post my problem. Recently i bought components for new computer, and i am experiencing a random program closing, sometimes restart right after windows is booted and logoned (not even theme and background is loaded correctly), even memtest sometimes show error. so i was assuming that memory is causing the problem.

First my configuration:
Asus p5kc
2x1g Patriot extreme
E6550 core 2 duo
8800gt
550W LC power supply

What i want to know is, what can cause those problems if memory modules are not corrupted? could it be cpu? or something else?

I also loaded system defaults so no overclocking during this problems.

I tried to raise voltage for memory module and for cpu, nothing better.

I am really desperate now i will be thankful for every info you will give.

Thank you!

Raising VDIMM usually doesn't help when you've got faulty RAM..

Also, it could be your PSU, LC units are really quite poor quality. Did it come with your case?

But yes, it does sound like bad memory.. It happens sometimes, even straight from the shop. Just say you ran memtest and got failures and they should replace it without too much hassle