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Prime 95 27.7 or 27.9 - Page 2

post #11 of 41
Thread Starter 
How does IBT compute for the Gflops results? Are those results accurate? I was surprised that at 4.7GHz 1.45V my Gflops were 30 Gflops higher than the results at 4.8GHz. Is this normal? Is Gflops a good way to measure OC performance?
Edited by kevindd992002 - 1/26/13 at 2:28pm
post #12 of 41
I don't think so. It seems like it is higher with HT off, and the more RAM you use the higher the GFlops. I believe RAM speed matters also, so I don't think it's a very accurate way to compare with tohers - might work for comparing to changes in your own system though, as long as you use the same settings all the time.
post #13 of 41
Thread Starter 
Quote:
Originally Posted by Forceman View Post

I don't think so. It seems like it is higher with HT off, and the more RAM you use the higher the GFlops. I believe RAM speed matters also, so I don't think it's a very accurate way to compare with tohers - might work for comparing to changes in your own system though, as long as you use the same settings all the time.

Well, the settings are the same for those two tests I've made?
post #14 of 41
Thread Starter 
In stability testing with Prime95, do you need to check SUM(Inputs) error checking and Round Off checking under the Advanced menu?
post #15 of 41
Quote:
Originally Posted by kevindd992002 View Post

In stability testing with Prime95, do you need to check SUM(Inputs) error checking and Round Off checking under the Advanced menu?

Yes.
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post #16 of 41
I don't think they apply to the torture test, only the actual Prime-finding program.

If you read the readme, it says:
Quote:
You should not need to use the Advanced menu. This menu choice is
provided only for those who are curious.
Quote:
SUM(INPUTS) error checking. Selecting this option will run an extra error
check on every iteration. This will slow down the primality test slightly.

Round off checking. This option will slow the program down by several percent.
This option displays the smallest and largest "convolution error". The
convolution error must be less than 0.49 or the results will be incorrect.
There really is no good reason to turn this option on.

Edited by Forceman - 1/28/13 at 9:41pm
post #17 of 41
I could have sworn I've noticed a difference in error finding capability with them checked, but it may have been placebo.

I'll have to do some more detailed testing.
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post #18 of 41
Thread Starter 
Hmmm ok. In the Sandy Stable thread, nowhere in there would you see that they recommended this to be enabled though. I wonder if these will make any difference, really.
post #19 of 41
Quote:
Originally Posted by Blameless View Post

I could have sworn I've noticed a difference in error finding capability with them checked, but it may have been placebo.

I'll have to do some more detailed testing.

I kind of remember there being an error-checking option with the torture test, but that was a long time ago (like 2004 or something). I think the SUMS thing is pretty new.

Edit: I just ran the torture test and the normal factoring with them both enabled and disabled, and there was no apparent difference (no extra messages or anything). If I decide to make another push for 5.0 then I'll try it both ways then.
Edited by Forceman - 1/28/13 at 11:34pm
post #20 of 41

I would use 27.7 until they fix 27.9. Use the default torture test which is round off checking method which will report the error if a thread stops as a rounding error or a BSOD with a stop error message. There is no need to mess with the advanced section when all your are doing is stabilizing an overclock.

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