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How long to run prime95?

Forum Overclocking : CPUs - How long to run prime95?

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ferociouscorpion   04-26-2009 at 06:39:50 PM

I overclock my E5200 to 3.33 mhz
idles around 39-42 c and load using prime94 goes up to 71 c at first but has been staying at 60-65 c using stock hs and fan

I've had it run prime95 for almost 12hrs now and it has no problem.
Is it safe to say that it is stable now and I could stop running prime95?

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flyin15sec   04-27-2009 at 02:54:15 AM
- 0 +

I usually do 6-8hours of SmallFTT and 8-12hours of Blend.

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optiprimox   04-27-2009 at 06:14:54 PM
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I've done around 2-4 hrs of both and have had good stable systems. I don't think you really need to run it 24hrs or more, as some extremists imho

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Bronze Overclocking badge jsc   04-27-2009 at 09:25:18 PM
- 0 +

I am one of those "extremists" who does a final 24 test run.

I was working up what I thought were the final settings of a Q6600/Gigabyte motherboard system. I decided to just let it run overnight. Next morning, it had crashed at the 14 hour point. Repeated that evening. It reached 18 hours before it crashed. After that, I test for 24 hours.

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Foolycooly   04-27-2009 at 09:41:07 PM
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Interesting note for the 'extremists.'

I ran prime95 blend for 13+ hours overnight w/o a hitch at my current settings. A couple of weeks later I got BSODed while playing an online flash game. I have had zero BSODs since, and do not plan on tweaking anything further. I have not BSODed during any heavy gaming sessions or during any heavy multitasking...just thought it was interesting to note that even if you run prime for 13+ hours, there is a possibility something can be missed.

I am also an advocate of enjoying your PC...run prime for a few hours and if it passes, enjoy what you paid for :P

------------------------------ i7 920 @ 3.8ghz
P6T Deluxe V2
OCZ Platinum 6gb @ 1520 7-7-7-18 1T
EVGA GTX 295
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MaDMagik   04-28-2009 at 10:56:51 PM
- 0 +

jsc wrote :

I am one of those "extremists" who does a final 24 test run.

I was working up what I thought were the final settings of a Q6600/Gigabyte motherboard system. I decided to just let it run overnight. Next morning, it had crashed at the 14 hour point. Repeated that evening. It reached 18 hours before it crashed. After that, I test for 24 hours.




Same situation here, I used to run it for 12hrs, forgot about it once and it crashed around 18th hour. I run it for 24hrs since.

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Bronze Overclocking badge jsc   04-30-2009 at 04:57:00 PM
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Ah, good. I am not alone.

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michaelmk86   04-30-2009 at 05:20:45 PM
- -1 +

There is no point to run prime95 for more than 20 min.
If you pass 20 min running prime95 with out crash that mean that cpu is 100% stable!!!
Running prime95 for 24 hours is just stupid I can say anything more.

Message quoted 2 times
Message edited by michaelmk86 on 04-30-2009 at 05:21:08 PM
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Foolycooly   04-30-2009 at 05:36:23 PM
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michaelmk86 wrote :

There is no point to run prime95 for more than 20 min.
If you pass 20 min running prime95 with out crash that mean that cpu is 100% stable!!!
Running prime95 for 24 hours is just stupid I can say anything more.



This is so incredibly wrong.

Message quoted 1 times
------------------------------ i7 920 @ 3.8ghz
P6T Deluxe V2
OCZ Platinum 6gb @ 1520 7-7-7-18 1T
EVGA GTX 295
 Reply to Foolycooly
MaDMagik   04-30-2009 at 06:22:03 PM
- 0 +

michaelmk86 wrote :

If you pass 20 min running prime95 with out crash that mean that cpu is 100% stable!!!
Running prime95 for 24 hours is just stupid I can say anything more.



If you can(?) say anything more than how about some explanation regarding your theory?

Message quoted 1 times
Reply to MaDMagik
michaelmk86   04-30-2009 at 07:14:03 PM
- -1 +

Foolycooly wrote :

This is so incredibly wrong.


MaDMagik wrote :

If you can(?) say anything more than how about some explanation regarding your theory?


Prime does not reflect realistic use scenarios. It could easily fail at 25 hours or at 48 hours so what are you going to do? leave your pc forever running prime to make sure? of course not. A friend of mine was running a prime unstable pc for 5 months with no single problem while playing games etc. So prime is just a rough indication that if you push your cpu at its absolute limits it may fail which of course you will never do under normal use.

So leave prime for 20 min and then enjoy your overclock benefits in realistic scenarios. ;)

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MaDMagik   05-01-2009 at 02:57:08 AM
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Well with gaming, web surfing etc maybe it really isnt a must. But my main PC is on 24/7 and when you do video encoding and have cpu under 85-95% load for hours it becomes a bit more important. If there was no chance for cpu instability causing damage to my work maybe I wouldnt care about it that much either.

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