System crash on almost all 3065 WUs

[Kibbo]

I've had this problem for a while now, almost every single WU from project 3065 will cause a complete system crash. Sometimes it takes just 5 minutes, and sometimes it can go on for several hours before my system goes blargh. First I thought it didn't like my overclocking, running a core i7 920 at 3.8GHz. So in order to check for instability I ran both Prime95 with 8 worker threads and stresscpu2 for several hours each, both did fine. I tried running with my CPU at default clocks, HT on and off but the problem is still there.

Unfortunately I don't have any error messages to show since it's a complete system lockup and no error reporting can be written to disk.

[7im]

System temps while running StressCPU v2? Have you also tried running a memory tester like MS Memory Tester, or Memtest86?

[Kibbo]

Memtest86 runs just fine, and the CPU temperature settles at 52-54 degrees C when running stresscpu2.