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post #41 of 77
OCCT or Prime95 LargeFFT for 24 hours!!
If it runs, dont even look at the temperatures. You'll never stress it that hard again, with any real applications, ever. Just make sure it's stable.
post #42 of 77
Thread Starter 
Quote:
Originally Posted by Volkovy87 View Post

OCCT or Prime95 LargeFFT for 24 hours!!
If it runs, dont even look at the temperatures. You'll never stress it that hard again, with any real applications, ever. Just make sure it's stable.

I'll give it a go tomorrow smile.gif
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post #43 of 77
Quote:
Originally Posted by Rubers View Post

I think so, yes. Since they underclock the CPU at various moments which drops the voltage and multipliers dramatically (at times) and this can cause instability when going form a high overclock such as 4.8, to something a lot smaller around 3GHz in moments. This is why we don't just stick a CPU into a machine and go from 3.GHz, to 4.8GHz in one go, we raise incrementally tongue.gif

Those C1E/C3/C6 numbers are the different sleep states of the chip.

Basically, when the chip isn't calculating, it goes into a low power state, C1, and then "deep sleep," C3, when idle for a longer period of time, and then "deeper sleep," C6, when idle for even longer.

These don't affect stability unless you have an unstable (or barely stable) overclock that you are trying to make work. Most people will witness BSOD's with those on, because as the chip comes out of sleep, there is a sudden demand for power, and they are riding the voltage too close to the edge.

In my opinion C3/C6 states should be included in the overclock, unless going for suicide runs. No one wants their processor running full bore all the time, it's a great way to build up heat and a big power bill.

This article is a little old, since it doesn't include C1E or C6, but you get the basic idea.
http://www.intel.com/support/processors/sb/CS-028739.htm
Edited by SectorNine50 - 4/8/12 at 9:26am
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post #44 of 77
I have to disagree about a 24 hour test without keeping an eye on temps. I believe thermal throttling doesn't start until 98c. Someone correct me if I'm wrong please. I wouldn't be comfortable running my cpu at say 85-90c or even higher for that length of time. That being said, 1.29v is a nice figure for a 4.8ghz overclock. Also what are your ambient temps ? I had the nh-c14 and it worked very well for me. In fact I added a 3rd fan to it and it beat out my buddie's d-14 on the same exact cpu. I understand you're only running the single fan configuration, but perhaps a re-seat would help. Also, you can use a program like coretemp not only to monitor your temps but to set a limit on how hot your cpu can get before either throttling back or shutting down. I wouldn't run an overnight stress test without it personally. thumb.gif
post #45 of 77
Don't forget to set your PC to "High performance" in the windows control panel, setting it to balanced or power saver can sometimes cause this.
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post #46 of 77
Quote:
Originally Posted by Alex132 View Post

Don't forget to set your PC to "High performance" in the windows control panel, setting it to balanced or power saver can sometimes cause this.

It won't downclock the processor unless the load drops below a certain threshold, balanced works fine and is preferred for idle temperatures and power usage. If he's getting downclocking while running Prime95, it's probably because Prime is dropping workers due to instability.
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post #47 of 77
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Quote:
Originally Posted by danielwiley View Post

I have to disagree about a 24 hour test without keeping an eye on temps. I believe thermal throttling doesn't start until 98c. Someone correct me if I'm wrong please. I wouldn't be comfortable running my cpu at say 85-90c or even higher for that length of time. That being said, 1.29v is a nice figure for a 4.8ghz overclock. Also what are your ambient temps ? I had the nh-c14 and it worked very well for me. In fact I added a 3rd fan to it and it beat out my buddie's d-14 on the same exact cpu. I understand you're only running the single fan configuration, but perhaps a re-seat would help. Also, you can use a program like coretemp not only to monitor your temps but to set a limit on how hot your cpu can get before either throttling back or shutting down. I wouldn't run an overnight stress test without it personally. thumb.gif

My ambient temp is around ~25C. I've already reseated the CPU once to add new TIM, which helped a lot.

I'll probably try out that program or just stay awake those 24 hours. wink.gif
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post #48 of 77
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Quote:
Originally Posted by Alex132 View Post

Don't forget to set your PC to "High performance" in the windows control panel, setting it to balanced or power saver can sometimes cause this.

I'm using the one called "ASRock eXtreme Tuner Utility", which is a feature on my motherboard.
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post #49 of 77
Im just saying, dont worry, even if it reaches 95, its normal, as long as its stable. Thermal throttling kicks in at 97-98C and it shuts down at 100.
3-4C headroom is more than enough for OCCT/Prime testing. Imho..
post #50 of 77
Quote:
Originally Posted by casp1887 View Post

I'm using the one called "ASRock eXtreme Tuner Utility", which is a feature on my motherboard.

I bet that is part of your problem. Shut down that utility. Do your overclocking from BIOS. A lot of times settings in these utilities can conflict with what's in BIOS and cause problems. Theres nothing in that utility you can't do yourself in BIOS. Any knowledgeable overclocker will tell you those types of utilities are not the best way to overclock. thumb.gif
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