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post #2211 of 7226
Quote:
Originally Posted by Exolaris View Post

Is there a definitive guide to overclocking on Broadwell-E out there? I just got my 6850k and I'm sitting at 4.4GHz all cores at 1.345 vcore. I don't really know where to go from here in terms of tightening it up. Stable in cinebench but not sure if that's a good enough indicator of overall stability.

Here are two good reads released by Raja@ASUS.

http://edgeup.asus.com/2016/05/31/get-best-performance-broadwell-e-processors-asus-thermal-control-tool/

http://edgeup.asus.com/2016/06/17/broadwell-e-overclocking-guide/
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post #2212 of 7226
Quote:
Originally Posted by cookiesowns View Post

So using that plus a small bump in VCCIO/Cache voltages allowed me to reach the 1hr mark on realbench @ 4.4Ghz @ 1.330V adaptive. 3.5 cache at 1.15V

Thanks JPM! I would get hardlock/crashes within 15 minutes at these voltage. Now running strong with those small changes. It's probably still not stable yet, but it's a good starting point now.

VCCIN 1.92 @ LLC 5

Yay!
Warning: Spoiler! (Click to show)
Update: dropping down to 1.32 results in 01A memory management crash. So it looks like I have more work to do. Or 1.33 is borderline stable.
NP bro, glad it helped.
01A? that may be cache...
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post #2213 of 7226
Quote:
Originally Posted by cookiesowns View Post

So using that plus a small bump in VCCIO/Cache voltages allowed me to reach the 1hr mark on realbench @ 4.4Ghz @ 1.330V adaptive. 3.5 cache at 1.15V

Thanks JPM! I would get hardlock/crashes within 15 minutes at these voltage. Now running strong with those small changes. It's probably still not stable yet, but it's a good starting point now.

VCCIN 1.92 @ LLC 5

Yay!
Warning: Spoiler! (Click to show)

Update: dropping down to 1.32 results in 01A memory management crash. So it looks like I have more work to do. Or 1.33 is borderline stable.

Nice to see another RB screenshot thumb.gif Which reminds me I never did post mine doh.gif

Edited my post to include it.
Quote:
Originally Posted by Jpmboy View Post

NP bro, glad it helped.
01A? that may be cache...

I solved a Memory Management bsod with a bump in vdimm, but who knows
post #2214 of 7226
Quote:
Originally Posted by Fidelity21 View Post

That looks awesome! Congrats!

I thought I was stable and happy at 4.3ghz with my 6850k running a Vcore of 1.298v. Unfortunately my computer just turned off in the middle of an underground mission and after restarting, I couldn't even find an error core in the System logs. So now I'm back up to 1.310v Vcore and as I'm typing this, my keyboard seems to be lagging behind??? I think I'm starting to get gremlins after a nice period of "all things working"

I wish there was a "normal voltage range" for 4.3ghz for all 6850k CPU's
It could have degraded as well. Or probably just bad overclock. In any case not going past 1.3v is the safest bet.
post #2215 of 7226
Quote:
Originally Posted by kingofsorrow View Post

It could have degraded as well. Or probably just bad overclock. In any case not going past 1.3v is the safest bet.

The computer system was restarting 2-3 times a day when the voltage was as 1.298v. Sometimes while using it, but according the system logs, it was rebooting itself while I was away from the computer as well. Some WHEA errors and some other errors. So I take that to mean that 1.298v just wasn't enough to keep it happy.

Now I'm at 1.310v and everything is running great. Played about 6 hours of The Division and most of the cores stayed below 65C. I'm running a custom water cooled system (EK X360 kit with extra radiator) so temperatures are staying very low under real world conditions. I also have Asus Thermal Control Tool installed so if anything goes over 78C then the system drops the core voltage and frequency ratio back to 3.6ghz and 1.200v.

I'm still not 100% sure on what degradation is or specifically how to prevent it, but I can't imagine voltage alone could cause it to fail prematurely. Expecially at such low temperatures and voltages. Going over 1.35v would be hard to keep cool with my system, but anything south of 1.325 or even up to 1.340v seems to be doable. The 1080 video card never goes over 55C under the most demanding programs and at it's max overclock of 2000mhz...but apparently that's because video cards are easier to keep cool vs. CPU's. smile.gif
    
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post #2216 of 7226
You need to test your system for stability with special programs like Prime95 smile.gif Not play guessing games.
post #2217 of 7226
Quote:
Originally Posted by kingofsorrow View Post

You need to test your system for stability with special programs like Prime95 smile.gif Not play guessing games.

You say that like I haven't already tried...check the thread for all of my posts.

Prime95 runs fine for 2 hours, Asus RealBench runs fine for 2 hours. The system runs fine for hours as well but like I said before, it resulted in system failures that seemed random. At first, I thought it was a windows 10 issue because the system was stable with benchmarks and testing software (like you pointed out). To your point, maybe 2 hours wasnt enough. But in my defense, I couldn't imagine a settings prior to this that would be fine after 120 minutes of heavy testing but NOT fine just sitting idle for a few days. Expecially something like Vcore that's only suppose to have an impact when the system is running at full tilt...not idle'd down at low voltage. It would explain the game crashes, but not the crashing at idle.

Anyway, 6 hours of gaming/netfllix watching/Prime 95/Realbench...everything seems solid as a rock now that I've gone to 1.310v so I'm not touching anything for a while. smile.gif
Edited by Fidelity21 - 8/7/16 at 3:01pm
    
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post #2218 of 7226
Quote:
Originally Posted by Fidelity21 View Post

You say that like I haven't already tried...check the thread for all of my posts.

Prime95 runs fine for 2 hours, Asus RealBench runs fine for 2 hours. The system runs fine for hours as well but like I said before, it resulted in system failures that seemed random. At first, I thought it was a windows 10 issue because the system was stable with benchmarks and testing software (like you pointed out). To your point, maybe 2 hours wasnt enough. But in my defense, I couldn't imagine a settings prior to this that would be fine after 120 minutes of heavy testing but NOT fine just sitting idle for a few days. Expecially something like Vcore that's only suppose to have an impact when the system is running at full tilt...not idle'd down at low voltage. It would explain the game crashes, but not the crashing at idle.

Anyway, 6 hours of gaming/netfllix watching/Prime 95/Realbench...everything seems solid as a rock now that I've gone to 1.310v so I'm not touching anything for a while. smile.gif
Careful with going above 1.3v with these CPUs. I would stabilize the overclock on exactly that voltage.
post #2219 of 7226
Quote:
Originally Posted by kingofsorrow View Post

Careful with going above 1.3v with these CPUs. I would stabilize the overclock on exactly that voltage.

So I should be cooked by now with the 1.4 vcore (and 1.356 vcache) I've been stress testing with for several days smile.gif. Of course that's max turbo vcore, most of the normal usage time it's fairly lower. But I do have quite a few hours of stressing at 1.4, no problems (yet biggrin.gif).
post #2220 of 7226
Quote:
Originally Posted by djgar View Post

So I should be cooked by now with the 1.4 vcore (and 1.356 vcache) I've been stress testing with for several days smile.gif. Of course that's max turbo vcore, most of the normal usage time it's fairly lower. But I do have quite a few hours of stressing at 1.4, no problems (yet biggrin.gif).

yeah - I've been over 1.3V since launch.. with "excursions" to 1.435V. redface.gif
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