Overclocking Prime 95 stress test error?

[Glaucus]

Trying to over clock and I get this error

[Fri Jun 27 16:20:51 2008]
FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.
M1061 completed P-1, B1=1000000, B2=100000000, E=12, Wd1: 06272351
FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.
[Fri Jun 27 16:37:57 2008]
FATAL ERROR: Rounding was 0.4999998744, expected less than 0.4
Hardware failure detected, consult stress.txt file.
FATAL ERROR: Rounding was 0.4999950794, expected less than 0.4
Hardware failure detected, consult stress.txt file.

Now what causes this error?

Lack of volts or something else?

It's on the first core which runs cooler than the other core. Yet it's always this one which fails, why the other one is stable even at higher overclocks.

 

[Cob]

Yip it's usually a lack of volts, tho depending on the test used it can be the memory.

Run the Small FFT's test and if it still happens then it's the voltage.

 

[Glaucus]

Yip it's usually a lack of volts, tho depending on the test used it can be the memory.

Run the Small FFT's test and if it still happens then it's the voltage.

Just upped the voltage and it was stable but peaked at 75degrees. So had to take it down.

 

[Glaucus]

Think this is the best I can get.
Unless i get some more case fans, which I do want to do but noctua are £14 each, not cheap