prime95 failure @ stock

Ugiol

Ugiol

Ugiol

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Hello...

Well ive had my pc up and running for a couple of days now and it scores well in 3dmark05 with 11600 and 06 with 5800. It calculates 1M superpi in 21 seconds. All goign great.. until i try prime 95. I set it up so that it runs on the two cores but it fails almost immediately when i open the second instance.

My spec is a giga ds4 motherboard with g skill 6400 ram, e6600 and an ati 1900xt.

Now everything is at stock but it fails prime which is obviosuly a bad thing. It is fine when i play games and such but i can't even fathom overlclocking it with it not even being stable at stock!

Any ideas as to why this happens?

The only thing i can think of at the moment is that the motherboard has undervolted the ram as it is at 1.8v atm and its tested at 2.2-2.3 Would upping the voltage put this problem to bed?

Many thanks for reading
 
Just upped the voltage by 0.3 so the vdimm is at 2.1. Ran prime for a lot longer than before, will let it run tomorrow for a longer while but for now im happy.

Thanks for the quick reply, just needed the confirmation of the problem as i have never really fiddled with the bios before.

Cheers
 
Download and run memtest86 to test your ram. Its the definitive ram test whereas prime95 is better as a cpu test and even with large ffts its probably not as good as memtest for testing ram.
 
I'm betting this is nothing to do with your hardware :)

Are you running two copies of Prime95 from the same folder? This is a bad plan because Prime creates temporary files, so if you run it twice from the same folder they overwrite each other and one of them fails.

Make a separate folder for the second instance of Prime and you should be fine :)

Apologies if you know that and I'm jumping to conclusions!
 
Mattus said:
I'm betting this is nothing to do with your hardware :)

Are you running two copies of Prime95 from the same folder? This is a bad plan because Prime creates temporary files, so if you run it twice from the same folder they overwrite each other and one of them fails.

Make a separate folder for the second instance of Prime and you should be fine :)

Apologies if you know that and I'm jumping to conclusions!
Click to expand...


I didn't know that actually, i just followed this guide that told me to put -A0 and -A1 after the shortcut to open up two instances of it. Upping the voltage to its test value has seemed to have done the trick nicely, but i will change it so it runs from two folders anyhow.

According to cpuz my ram timings are 3 4 4 12 in the first 4 rows, now on the product spec it says the ram should run at 4-4-4-4-15, im not sure where the extra digit fits in but it doesn't seem to have an adverse effect running at this.

I will read up on how to use memtest later to double check the ram.

Thanks for all the help, if I run into any more problems I will now doubt post again ;)
 
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Don't run prime okay!!!

SP2004!! 2 lot of that or the new beta version which does 2 at once anyway!
 
Drazic said:
Don't run prime okay!!!

SP2004!! 2 lot of that or the new beta version which does 2 at once anyway!
Click to expand...
Even though SP2004 is actually built on the prime engine.... just more of a GUI. :rolleyes:
 
Nope all users and testers of Conroe to date have ran SP2004 as Prime 95 directly doesn;t work propely and is ment for one core logic unit only not two or more!

if thats the case then why have all been using Sp as to Prime!
 
People use sp2004 because its easy, particularly for dual cores.
As far as i know sp2004 and prime stress test are technically identical, sp2004 simply uses a different gui.
So it doesn't matter which is used, and neither are really suitable for memory stress testing.
 
Drazic said:
Nope all users and testers of Conroe to date have ran SP2004 as Prime 95 directly doesn;t work propely and is ment for one core logic unit only not two or more!

if thats the case then why have all been using Sp as to Prime!
Click to expand...
Do you enjoy making stuff up? Of course prime is designed for multicores. When people are searching for mersenne primes, do they use a single core computer only? Why does prime have the inbuilt 'affinity' setting? Maybe the programmers thought they'd waste menu space perhaps?
 
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