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Skylake Overclocking Guide [With Statistics] - Page 334

post #3331 of 11361
My original plan was to go with the above mentioned 35x132 OC on my 6600k, but it turned out pirme95 28.7 rounding error pops up in about 45 min with that, since I don't want to go over 1,4 vcore yet, I had to come down to 35x130. 1 hour prime95 test is a go now.
(I need absolute 100% stability since I'm testing software, and they crash on their own, cant risk to hunt non existent problems because my rig)

So here is my rock stable 4550 Mhz OC

Username: Balu0
CPU Model: I5 6600K
Base Clock: 130 Mhz
Core Multiplier: 35
Core Frequency: 4550 Mhz
Cache Frequency: 4160 Mhz
Vcore in UEFI: 1,37V
Vcore: 1,408V
FCLK: 1040 Mhz
Cooling Solution: Corsair H110 water
Stability Test: Prime95 28.7 1 hour+

Batch Number: Hungary # L521B645
Ram Speed: 2800 Mhz 14-15-39 Predator
Ram Voltage: 1,35V Sa: 1,2V
Motherboard: Asus Maximus VIII ranger
LLC Setting: levle 6
Misc Comments:I think this will be fine


Validation for 35x130 4550 Mhz
post #3332 of 11361
Is it generally best to stay below 4.8GHz or can you go above that and be safe as long as you are below the 1.45V mark?
    
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post #3333 of 11361
Quote:
Originally Posted by CC268 View Post

Is it generally best to stay below 4.8GHz or can you go above that and be safe as long as you are below the 1.45V mark?

go for the highest multi trying to keep temps below - say something like 90C - and load cpuv around 1.45v max thumb.gif
post #3334 of 11361
Quote:
Originally Posted by CC268 View Post

Is it generally best to stay below 4.8GHz or can you go above that and be safe as long as you are below the 1.45V mark?

a lot depends on the peak and sustained temperatures the cpu will experience at that voltage. INtel's recommended absolute max for vcore on skylake is 1.52V. Table 7.2 in the product datasheet.
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post #3335 of 11361
Quote:
Originally Posted by Jpmboy View Post

a lot depends on the peak and sustained temperatures the cpu will experience at that voltage. INtel's recommended absolute max for vcore on skylake is 1.52V. Table 7.2 in the product datasheet.

what happened to 1.45 as max tongue.gif

edit - maybe the question is why the intel data sheet says 1.52 but asus and (intel contradicting themselves) say 1.45v? sozo.gif
Edited by SteveRo - 10/29/15 at 6:37pm
post #3336 of 11361
Yea no way I would run 1.45V as my daily driver but I'm just curious what I can push to...I think I am gonna call it quits at 4.8GHz since I am at around 1.45V to be stable.
    
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post #3337 of 11361
Quote:
Originally Posted by Klutz0 View Post

Here's my revised plan:
  1. Update to the latest HWiNFO beta version.
  2. Run x264 at stock settings to validate that the readings were valid.
  3. Set min proc state to 100% in Windows' Advanced Power Settings
  4. Run x264 at stock settings, check if the processor still drops to 800MHz.
  5. Disable C-States in BIOS
  6. Run x264 at stock settings, check if the processor still drops to 800MHz.
  7. Set "Core Current Limit" and "Power Limit TDP" to the maximum values the BIOS will allow.
  8. Run x264 at stock settings, check if the processor still drops to 800MHz.
  9. If none of that helps...
  10. Order thermal compound from newegg to replace the pre-applied thermal paste from the H90.
  11. Run x264 at stock settings, check if the processor still drops to 800MHz.
  12. Give up all hope.

Ok, so I've got a couple hours and will try out what was suggested!

Here's what I've done and observed so far:
  • Before even booting the PC tonight, I very slightly loosened the H90 and tightened it with a screw driver (not excessively, but tighter than it was)
  • Installed the most recent HWiNFO beta version (v5.07-2665)
  • x264 is currently running. Observations:
    • Temperature started at around 45°C and ramped up slowly to ~55.
    • When it hit ~55, it started dropping it's frequency to 800MHz. Last night it was dropping to 800MHz when the temp would hit ~70... It's seems my situation is getting worse... frown.gif
    • PROCHOT went to "yes" a few times.
    • "CPU" fan speed shows a constant 1500rpm while "CPU OPT" fan speed shows around 900rpm. I'm not 100% sure which value is the CPU fan header and which is the SYS fan header. I have the H90's pump plugged into the CPU fan header and the H90's fan plugged into the SYS fan header. The pump's connector is only 3 pins, which means it doesn't get regulated by PWM, right?

Next step: Set min proc state to 100% in Windows' Advanced Power Settings and run x264 again.
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post #3338 of 11361
Mr. Klutz0 - what cpuv are you pushing? download and run realtemp 3.70 just to get a confirmation on the temps you are seeing in hwinfo. something looks not good - prochot at 55C does not make any sense redface.gif
post #3339 of 11361
Quote:
Originally Posted by SteveRo View Post

what happened to 1.45 as max tongue.gif

edit - maybe the question is why the intel data sheet says 1.52 but asus and (intel contradicting themselves) say 1.45v? sozo.gif

Intel's recommended max is what it is. Asus, after testing a bunch of cpus recommends 1,45V that's all I know. I "believe" some of this may be due to intel assuming different conditions, like a max over shoot of 70mV is managed by droop... coincidentally resulting in a 1.45V recommendation from ASUS? IDK. I keep saying vdroop is a good thing for 24/7 voltage settings wink.gif Just my 2cents.gif
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post #3340 of 11361
Quote:
Originally Posted by CC268 View Post

Yea no way I would run 1.45V as my daily driver but I'm just curious what I can push to...I think I am gonna call it quits at 4.8GHz since I am at around 1.45V to be stable.

run in adaptive or offset mode - then only when approaching 100% load do you apply full volts thumb.gif
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