Can Video Card OC cause failure in prime95 torture test?

[dnycompbuilder]

Yeah so i bumped my voltage up to 1.825 on my xp2000+ tb and bumped my speed up to 167/11.5 for a grand total of 1921 mhz but it failed under prime 95, so i tried it at 166/11.5 and it still failed ive got my video card OCed could this be causing the failure? Or am i just at the CPUs wall at 165/11.5 i can bump my voltage down to 1.80 and run that stable. So i guess im just curious as to what is holding me back. I run 2 512 sticks of crucial pc2700 so i know its not the memory because that should be able to hit 333fsb. If anyone could help me out with this that would be great. Im on a7v8x MB and my cooling is slk-900u with a 92mm vantec tornado fan so it never gos over 35c evemn under prime.

 

[eklass]

just having prime95 is a problem...

on my non-oc'ed system with good crucial ram and a quality enermax psu, prime95 still fails. many others have similer problems. don't use it.

 

[dnycompbuilder]

what do you suggest using?

 

[oldfart]

Originally posted by: eklass
just having prime95 is a problem...

on my non-oc'ed system with good crucial ram and a quality enermax psu, prime95 still fails. many others have similer problems. don't use it.

I would disgree with that. If your system is not stable in Prime95 overclocked or not, it has a problem. I always use it as a stability bench. My current overclocked rig has no problem at all running it.

 

[dnycompbuilder]

see thats what im saying it runs rock solid @ 1.9ghz but if i take it to 1916 it fails every time. Solid under prime 24hrs @ 1.9 though guess ill have to be sated with that overclock

 

[Duvie]

Back to the vid card thing.....Ocing vid card is not likely to cause errors but it could if voltages are a bit weak...often an oc'd card is taking a bit more juice.

Ppl who discount prime95 are the ppl who do not want to face the system may be unstable......It has been a perfcet measure for me...I have been able to not pass prime and still have no issues in heavy loaded programs. However eventually it seems to catch up with you in some program...

Remember prime is a rather simple program using a mathematical forumlas...The cpu either can do it or not, reliabley at the speed it is or not....Many programs can be forgiving when it comes to slight rounding errors and miscalculations as they can often be hidden without a major problem...the fact is they are there and they could become and issue at any time...How would you like to be running seti but all the work units you have completed are flawed...wahta awaste for you and the ppl the data is going to...

 

[lenjack]

You don't really think the difference between 1900 and1916 is signifigant, do you? It's the same percentage difference as going from 190MHz to 191.6 MHz.

 

[chizow]

You're FSB could be unstable beyond 166MHz. Dividers/FSB/Multipliers are still an issue with boards that don't have PCI locks. Also, don't overlook the RAM as the problem. You're using high density modules on double-sided dimms and running 2 sticks simultaneously. You're RAM is rated to do 166MHz at specified timings and should have some headroom, however, 2 sticks have historically decreased stability at higher FSB speeds w/ identical timings. I'd try lowering your timings and see if that stabilizes your OC. My guess is that you've just run into the CPUs clockspeed ceiling.

Chiz

Oh yah, and I do feel Prime95 is an excellent test of stability. 🙂

 

[dnycompbuilder]

No i dont beleive that there is going to be a significant difference in the clock speed but as all of you overclockers know its not about that, its about taking it as far as i can take it, and i was setting my sites for a 166fsb. I know theres virtually no performance difference its the principal of the thing man. O and btw does the a7v8x have pci lock?