BSOD happening randomly and I can't pinpoint a reason

Ok, here is my update:

For the stress test the temperature never went over 76, it actually went down to 75. I ran it for a little over 2 hours and it didn't report any kind of problems.

Something else curious happened. Once when I restarted the computer yesterday it wouldn't boot and was giving me 1 long beep and 2 short beeps. When I looked that up it appeared to be a ram. I cleaned the ram and put it back in and it booted.

The second time I ran the memtest it got through 7 passes without any problems. I just realized I was supposed to let it go for 8 Do I need to run it again and let it complete 8 full cycles?

So my questions is, do you think that the ram would be causing all of those problems or do I have some other hardware stuff happening?

Well it's been over a day and I haven't had a problem yet. I suppose it's too early to tell but I think things are looking good right now!

Thanks again for all of you help.