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Old 2009-07-13, 05:22   #155
cheesehead's Avatar
"Richard B. Woods"
Aug 2002
Wisconsin USA

170148 Posts

Originally Posted by petrw1 View Post
... who would have thought???
Thermodynamics RULZ!
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Old 2009-07-13, 09:42   #156
garo's Avatar
Aug 2002
Termonfeckin, IE

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Originally Posted by petrw1 View Post
Well I got a chance to dust it ... both the back and side vents were complete blocked. It is now running more than twice as fast as before ... who would have thought???
I had a similar experience and I was surprised too. But yes, dust in the heatsink can significantly slow down the CPU due to thermal throttling. Now I clean my CPU heatsinks at least once a quarter

Last fiddled with by garo on 2009-07-13 at 09:43
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Old 2009-08-04, 23:42   #157
Aug 2009

3 Posts

I am under the impression that on multicore machines the rolling average is computed based on the last worker. When you have for instance core 0, 1 and 3 doing LL tests and core 2 doing TF, the rolling average based on core 3 is very optimitic for cores 0 and 1. (Core 3 has a much better access to memory, while core 0 and 1 are competing for memory throughput.) This means that to compute a reliable ETA there should be a rolling average per core (or per worker). Another solution would be a rolling average based on all cores.
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Old 2009-08-27, 00:43   #158
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Sep 2003

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I'm not sure if this is a bug or not, but Prime95 25.9.4 (32-bit) crashed on one of my machines. The crash occured 2 seconds after one of the cores had found a factor in stage 2 of P-1.

The machine is a Core i7 920. The operating system is Windows XP. It is not connected to the internet, so I get and report assignments manually. Three cores are running double checks, and the fourth is running P-1. This machine has previously found P-1 factors in stage 2 with no problem.

The error messages in the event log say:

Faulting application Prime95.exe version faulting module ntdll.dll version 5.1.2600.2180, fault address 0x00011e58.

The exeption generated was C0000005 at address 7C911E58 (ntdll!RtInitializeCriticalSection)
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Old 2009-09-21, 14:21   #159
Oct 2008
Annapolis, Md

7 Posts
Default Fault in ntdll.dll reported by USER32

I've seen prime95 crash on several machines now with the following log event

Faulting application prime95.exe, version, faulting module ntdll.dll, version 5.1.2600.5755, fault address 0x00010a19.

I saw a similar event posted in the forum does anybody know why prime95 version 25.9
is causing this.

Any help would be appreciated

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Old 2009-09-21, 16:30   #160
lfm's Avatar
Jul 2006

52×17 Posts

I am pretty sure this was fixed long ago in version 25.11 (current) or earlier.
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