Random BSOD: BCCODE 50

Prime 95: test Blend. No errors reported after 2 hours.

Will run the other 2 tests and will post back the results.

Thanks!


[Tue Dec 27 19:01:58 2011]
Self-test 512K passed!
[Tue Dec 27 19:17:47 2011]
Self-test 8K passed!
[Tue Dec 27 19:34:52 2011]
Self-test 640K passed!
[Tue Dec 27 19:52:00 2011]
Self-test 12K passed!
[Tue Dec 27 20:09:34 2011]
Self-test 768K passed!
[Tue Dec 27 20:24:45 2011]
Self-test 20K passed!
[Tue Dec 27 20:39:45 2011]
Self-test 864K passed!
[Tue Dec 27 20:55:38 2011]
Self-test 28K passed!

Prime95 Blend and small FFTs tests did not report any errors, however, large FFTs test reported a hardware failure:
FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.

Can anybody provide me with some details on what this problem means? is it genuine? When can I expect the computer to fail due to this?

I do not know what the problem is but I do not think is cooling. I ran all 3 Prime95 tests with the fans at the max speed and proccessor temperature was always below 30degC.

Thanks!

[Tue Dec 27 19:01:58 2011]
Self-test 512K passed!
[Tue Dec 27 19:17:47 2011]
Self-test 8K passed!
[Tue Dec 27 19:34:52 2011]
Self-test 640K passed!
[Tue Dec 27 19:52:00 2011]
Self-test 12K passed!
[Tue Dec 27 20:09:34 2011]
Self-test 768K passed!
[Tue Dec 27 20:24:45 2011]
Self-test 20K passed!
[Tue Dec 27 20:39:45 2011]
Self-test 864K passed!
[Tue Dec 27 20:55:38 2011]
Self-test 28K passed!
[Wed Dec 28 19:06:05 2011]
Self-test 20K passed!
Self-test 20K passed!
[Wed Dec 28 19:21:28 2011]
Self-test 8K passed!
Self-test 8K passed!
[Wed Dec 28 19:39:09 2011]
Self-test 28K passed!
Self-test 28K passed!
[Wed Dec 28 19:56:58 2011]
Self-test 12K passed!
Self-test 12K passed!
[Wed Dec 28 20:13:41 2011]
Self-test 24K passed!
Self-test 24K passed!
[Wed Dec 28 20:29:39 2011]
Self-test 10K passed!
Self-test 10K passed!
[Wed Dec 28 20:46:35 2011]
Self-test 32K passed!
Self-test 32K passed!
[Wed Dec 28 21:03:56 2011]
Self-test 16K passed!
Self-test 16K passed!
[Wed Dec 28 21:19:38 2011]
Self-test 20K passed!
Self-test 20K passed!
[Wed Dec 28 21:37:26 2011]
Self-test 8K passed!
Self-test 8K passed!
[Thu Dec 29 17:12:58 2011]
Self-test 448K passed!
Self-test 448K passed!
[Thu Dec 29 17:28:24 2011]
Self-test 128K passed!
Self-test 128K passed!
[Thu Dec 29 17:44:46 2011]
Self-test 512K passed!
Self-test 512K passed!
[Thu Dec 29 18:00:50 2011]
Self-test 160K passed!
Self-test 160K passed!
[Thu Dec 29 18:15:53 2011]
Self-test 640K passed!
Self-test 640K passed!
[Thu Dec 29 18:24:34 2011]
FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.
[Thu Dec 29 18:33:31 2011]
Self-test 224K passed!
[Thu Dec 29 18:50:24 2011]
Self-test 768K passed!
[Thu Dec 29 19:06:49 2011]
Self-test 256K passed!
[Thu Dec 29 19:24:15 2011]
Self-test 864K passed!
[Thu Dec 29 19:40:27 2011]
Self-test 320K passed!
[Thu Dec 29 19:57:58 2011]
Self-test 960K passed!
[Thu Dec 29 20:14:30 2011]
Self-test 384K passed!
[Thu Dec 29 20:29:55 2011]
Self-test 480K passed!
[Thu Dec 29 20:46:08 2011]
Self-test 144K passed!

[Thu Dec 29 18:24:34 2011]
FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.

A single fault was detected, you may need to replace the CPU.

Thanks yowanvista.......I increased the speed of the fans and then ran Prime95 tests. Large FTTs tests failed. However, after I increased the speed of the fans, I never saw a BSOD again - the computer has been ON for 10 days or so with no BSOD at all. With the initial speed of the fans I had, I got a BSOD every 24 hours.

I guess some processor spec is failing marginally at 30degC. When the temperature is dropped somewhere below 20degC, it never fails. This is a marginal failure, but it makes the system not fully reliable.

Thanks for your help!