faulty RAM?

[Vicious]

So, you probably did notice the "?" at the end of the title. The reason for I don't really know wheter my Ram is okay or not is, that whenever I use memtest without having used the PC just before, I don't seem to get any errors, and i ran it about 7 Passes. Though, while using my System I always get bluescreens and checksumm errors, and when i run memtest directly after getting errors on windows, memtest usually finds some errors, too. So actually I thought that it could be some sort of overheating, but my cpu temperature looks pretty ok (it doesnt come close to its limit). Uhm, so any ideas on what that means would be appreciated :)

(Please try not to mind the bad English too much, I just can't do better)

Hardware:
AMD Phenom II X4 945 Box 95W
Sapphire HD 5870 1GB GDDR5 PCI-Express
Corsair HX450W 450 Watt
Gigabyte GA-MA770T-UD3P, AMD 770
4x 2GB RAM (GEIL Value, PC3-10660,1333MHz ,CL9, DDR3)

 

[edijs]

memtest can run all kinds of different tests on the RAM. Did you try to run all of them? Maybe the problem surfaces when the ram gets some workload, but has its actual roots inside some lower level (kind of, that is).

You can also try and boot into the operating system and run a RAM testing application from there, not from a boot disk.

Anyway, if memtest shows errors (no matter when the error surfaces - at the beginning or after some work is done), the RAM is probably dying. But maybe not all of it, though. If you have 4 sticks, try to run the computer with two at one time only. maybe you can isolate the faulty unit and replace it. I have had this kind of problem with having two ram sticks and the computer getting BSODs all the time, but then when I took one stick out, the system ran fine - turned out, that that particular stick was bad.

 

[Vicious]

memtest can run all kinds of different tests on the RAM. Did you try to run all of them?

I said I ran 7 passes. One pass already includes all tests

Maybe the problem surfaces when the ram gets some workload, but has its actual roots inside some lower level (kind of, that is).

You can also try and boot into the operating system and run a RAM testing application from there, not from a boot disk.

Actually, the Bluescreens and the Checksum errors are quite enough of a test. But where do you think is the point in testing the RAM in that way?

Anyway, if memtest shows errors (no matter when the error surfaces - at the beginning or after some work is done), the RAM is probably dying. But maybe not all of it, though. If you have 4 sticks, try to run the computer with two at one time only. maybe you can isolate the faulty unit and replace it. I have had this kind of problem with having two ram sticks and the computer getting BSODs all the time, but then when I took one stick out, the system ran fine - turned out, that that particular stick was bad.

I did test the RAM seperately, but I didnt get any errors then. Somehow, the problem doesnt appear permanently. I get lots of errors for a few days and then again for a few days I get absolutely none. And some days ago I somehow discovered that just by removing the ram and immediately putting it back in the slots again, the problems disappeared (after 2 days or something they were back again though)