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Haswell Overclocking Guide [With Statistics] - Page 866

post #8651 of 19571
Quote:
Originally Posted by fritzdis View Post

I'm using the x264 Benchmark with the loop script to test my overclock, but it's skipping some of the loops. Is this a clear indicator of an unstable overclock, or might there be some other issue?

To clarify, it's not failing during a loop from what I can tell. When one loop finishes, it (sometimes) immediately skips over the next loop without any error message.

Here's my hardware and current settings:

4670k, Asus Z87-A
Core: 43x / 1.2V Manual
Cache: 33x / Auto
Ram: Auto (1333)
VCCIN: Auto (1.792 under load in HWINFO)

I changed a few options under DIGI+ VRM and CPU Power Management based on explanations from a ROG article, but I want to make sure I'm actually experiencing an unstable overclock before trying to revert or change these options.

The setup above passed 1 hour of Prime (27.9, Small FFT), 1.5 hours of Aida (CPU, FPU, Cache, GPU), and 5 runs of RealBench Stress Test. I then tried bumping the Vcore up to 1.225, but the same issue arises. This time I watched carefully at the end of each run, and each time a loop was skipped (3 times in 8 loops), it was immediate. I really don't know what to make of this. Any suggestions on how to proceed would be appreciated.
post #8652 of 19571
Dark, i just tried out prime95 blend on this 45x 1.38v, and 20min in I hit 100c. I this marks the thermal max that I'm happy with in this system.

In going to now see how low voltage I can get away with on 43x just for kicks.

*My highest thermal max for testing, that is. I don't like that this thing is able to pump out that much heat in a synthetic test. I thought 85c was high enough for a prime95 small test!
Edited by Mysticode - 1/19/14 at 1:00am
post #8653 of 19571
Quote:
Originally Posted by Mysticode View Post

Dark, i just tried out prime95 blend on this 45x 1.38v, and 20min in I hit 100c. I this marks the thermal max that I'm happy with in this system.

In going to now see how low voltage I can get away with on 43x just for kicks.

*My highest thermal max for testing, that is. I don't like that this thing is able to pump out that much heat in a synthetic test. I thought 85c was high enough for a prime95 small test!
Yeah, people weren't exxagerating how hot haswell runs frown.gif
I got myself a temporary hyper 212 evo and the chip at stock on an intel burn test reached 90C. I ran some BF4 and saw it stay from 50-70C's was pretty insane
  
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post #8654 of 19571
Time to delid. wink.gif
post #8655 of 19571
Jamey!!! No. Lol. I'm not that extreme.

Would you guys say 30 mins on prime95 blend is a good stability check? Or should I run it or something else for a longer period of time.

Oh btw hulk I'm running a Corsair h100i with 2x Corsair SP 120mm Quiet fans, in a low airflow Fractal Design R4 case. I'm starting to wonder if other fans would make much of a difference.
Edited by Mysticode - 1/19/14 at 1:27am
post #8656 of 19571
Quote:
Originally Posted by Mysticode View Post

Jamey!!! No. Lol. I'm not that extreme.

Would you guys say 30 mins on prime95 blend is a good stability check? Or should I run it or something else for a longer period of time.

Oh btw hulk I'm running a Corsair h100i with 2x Corsair SP 120mm Quiet fans, in a low airflow Fractal Design R4 case. I'm starting to wonder if other fans would make much of a difference.

Use X264. After you pass a loop of 20 go about your daily activity. If you BSOD then just add .002vcore and you should be just fine. (Assuming it is a x124)

Other fans would make a difference. I'd get some AP-15s if I were you. I've got them all throughout my build.
post #8657 of 19571
How are they in acoustics? With my SP 120 fans in high load on my system, they max our at around 1500 rpm and produce a low hum.
post #8658 of 19571
Quote:
Originally Posted by Mysticode View Post

How are they in acoustics? With my SP 120 fans in high load on my system, they max our at around 1500 rpm and produce a low hum.

AP15s are known for their sound signature. 60-70% they are almost inaudible to me. That's with a 6 of them running and my case about 3 feet from me. They actually run at 100% right now because I'm too lazy to set a fan curve and with headphones on and nothing playing through them I can't hear them.
post #8659 of 19571
Quote:
Originally Posted by Mysticode View Post

Jamey!!! No. Lol. I'm not that extreme.

Would you guys say 30 mins on prime95 blend is a good stability check? Or should I run it or something else for a longer period of time.

Oh btw hulk I'm running a Corsair h100i with 2x Corsair SP 120mm Quiet fans, in a low airflow Fractal Design R4 case. I'm starting to wonder if other fans would make much of a difference.
I'm gonna be "that guy"

People tend to deem stability in 2 manners, stable for their use and 100% stable.

If all you do is watch movies, play solitare, and respond to work emails, sure passing every stability test might not interest you. As long as your computer does not crash during work.

Then there is the other user who, if your OC can pass 12 hours of prime95 but can not pas 18 hours of prime95 it is not stable.

Both have pro's and con's. With haswell it's so different imo frown.gif For ivy and sandy was something like, you only use notepad and ms word right, your oc can handle both, in some situations like opening a 5mb or 20mb word document your processor would get hungry and the droop might go for a split second to a vcore your computer couldn't survive 2 minutes on. So you didn't bsod, but if you stress it a bit more you might.

But haswell, no droop so you either have enough vcore or you don't eh, less to factor in with the FIVR but seems easier to find out if you are "stable" There is no huge LLC to calibrate between a vcore your computer needs and what it will droop to and stay stable at.

It's hard to point a finger at exactly what will trigger it or wont because everyone will do different things on the PC so what is stable for you might work on your end but if I try to use photoshop or render a video on your PC it might crash right?

I personally only see there being one stable. Like with memory overclocks... 1 error is 1 error too many, If you OC memory and it isn't 100% proper you are going to run into some problems with the quality of your files. Simple stuff to bigger stuff, file corruption is never good biggrin.gif

Sure you will never stress the CPU to the point where Prime95 does for 24hours, practically impossible to simulate the temperatures through real world applications also. The only difference is knowing there is NO situation that can crash your overclock, no possible program
Edited by INCREDIBLEHULK - 1/19/14 at 1:44am
  
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post #8660 of 19571
I'm happy 42x @ 1.25v has survived this long on prime95 blend. Max temp is 80c which is great.

I'll try x264 next I guess.

Really determining for 24/7 usage if 1.25v (if it's stable that is at 42x) is better for the longevity of my cpu vs 1.32v at 44x. Will there be any real difference in the wear and tear of the electronics involved?
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