Overclock stable, but not when gaming...

Well i got a lot more debate than I bargained for there, but it gives me plenty more information about these stability testers and heat output etc.

I was well aware that overnight wouldn't really be enough of a test but i have been fairly busy so just wanted some results. I will just wait in the future and OC when i have sufficient time to do so.

Plus i will remember to get the newest versions of software in the future (idiot :()


Thanks again everyone for the assistance.
 
I've had things pass IBT constantly but fail Prime95 after 30 or so minutes.

Regarding stressing, how long do you deem that it is "stable" you could stress Prime95 for 24 hours but what happens if you had done it for 25 and then it failed? You can't know... Unless its mission critical I have been happy using IBT as a rough guide and Prime95 if I have ever had problems I can then use that to make sure it is more stable. I'm no expert and I'm not taking my system to the extreme and I don't mind if I get a bluey once every month.
 
Roverno said:
For anybody that has an ASrock board (or knows) which Level of LLC is highest? Im pretty sure that level 1 is the highest but im not 100%.
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Yes, its lower = higher, at least with the P67pro boards i dealt a lot with.

jallan said:
I've had things pass IBT constantly but fail Prime95 after 30 or so minutes.

Regarding stressing, how long do you deem that it is "stable" you could stress Prime95 for 24 hours but what happens if you had done it for 25 and then it failed? You can't know... Unless its mission critical I have been happy using IBT as a rough guide and Prime95 if I have ever had problems I can then use that to make sure it is more stable. I'm no expert and I'm not taking my system to the extreme and I don't mind if I get a bluey once every month.
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Most people do mind and would rather a system that doesen't give up the ghost randomly.
 
Justintime said:
Most people do mind and would rather a system that doesen't give up the ghost randomly.
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Then how long do you need to test for stability on Prime95? I see a lot of numbers thrown around but ideally you can't guarantee a faultless overclock at all so it comes down to opportunity cost, do you push it a bit more and risk that you might in the space of 30 days get one blue screen or do you stress for an endless amount. I imagine those that only run P95 for 12 hours are probably running that risk anyway, if it was mission critical you'd be running Prime 95 24 hours at least but who has that sort of time on their hands...

By the way, I wasn't implying I assume the overclock is good if it passes IBT, I use IBT as a heat gauge to see what I should expect at that voltage. I run both but usually give Prime a 12 hour run and leave it at that, I usually need to utilise my PC by the time I wake up in the morning. My comment was more, IBT in my experience can be pass pass pass, Prime 95 could be a failure in a few minutes.
 
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The trouble with IBT is that the "standard" memory usage is hardly a stress test at all with modern chips, it's from the days when 2GB of memory was considered a lot.

You need to manually set it much higher, say 7GB on an 8GB system (sufficiently high that it uses all the free memory, but not so high it causes paging). If you do this, you see the GFLOPS column increase to near peak theoretical maximum, and also it becomes such a good stress test it finds instability within 5-10 loops (though this is open to debate).

The intel people obviously know how to use it but I wish whoever released it to the public sent out some documentation.
 
Silly volts for a 5GHz 24/7 clock.

5GHz, imo, is not a suitable 24/7 2500k clock unless you have a decent chip that can run more agreeable 24/7 voltages.

If it crashes while gaming, it's not stable - irrespective of what ANY test suite can do or not do. They are merely tools to give an indication of testing and provide isnight into what to do next for gaining stability or lowering voltages/temps. They are not the bottom line in stability as your game crash has demonstrated :D

On my old Q6600 I could make the system BSOD in Battlefield BC2 but never in IBT/Prime. Lowered the clock slightly, all was good.
 
Roverno said:
Hi all,

I have overclocking my 2500k in sig below and was running 5GHz on 1.425V, that was fine for 20 mins but not overnight so i clocked back to 4.9 and reduced voltage to around 1.408v. That was stable for an overnight run of prime 95 blend test but when i was playing diablo i got blue screen with error 0x124. As far as i know that means i need increased Vcore, why on earth would it be able to run prime for hours but not be capable in gaming??

What is going on here?
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5G's @ 1.425v :eek:

Get that down man, theres no need what so ever to have it that high for cpu speed etc, no game on the market I am aware of will benefit from that, its the graphics card and motherboard that will do that work mate, tweak it all down a bit, sorry I am in a hurry and didnt look to see what board or card you have etc, but thats the facts man as far as I know.

There again, maybe your just one of those guys that like to see 5'Gs on cpuz, lol, no need for it though honestly, I have to admit that I used to be a bit like that myself, but not now, I got a bit older and wiser, lol. hehehehe.;)
 
when ever i o/c my system i test for stability for 20mins or so and then i put metro 2033 or crysis on for a bit,if it plays through for about 30 mins im happy its stable,never ran any test for any longer,i only game though
 
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