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To high temperatures on 6700k with water cooling.

post #1 of 12
Thread Starter 
Hi, I have too high temps on my stock Skylake cpu i7 6700k.
For cooling I using:
-Hardware Labs Black Ice SR1 420
-XSPC Raystorm CPU block
-MCP355 pump
-fans 140mm Alphenfohn (working on 800-1200 RPM).
-Thermal paste: Gelid GC Extreme

Mobo: Asus Z170 Hero
PSU: EVGA SuperNova G2850W

Here is screen from HWInfo, for testing I used OCCT - Linpack, all logical cores, avx:




Are these temps to high or it is normal for Skylake?
Edited by Xender - 9/30/15 at 1:49am
post #2 of 12
Hi, yes they seem a bit high for stock. 70 is pretty high, the ones that are above 70 i don't know what they are, but i don't think they count. Did you check the temperature with other program ? Also you should check your watercooling system if it is well set up, it should perform better. What is the temperature in your room ?

On the other hand Linpack is a pretty extreme benchmark if i'm not mistaken, and it could generate such heat.
post #3 of 12
I also have the same CPU block but little more rad , 2X140 and a 3X140 and a mcx35x (around 3000 rpm) , at 4.2ghz with 1.25v im hovering around 42 to 38 on all core while doing prime95 1344k , and 50 with 8k test. I dont know if OCCT heat more than prime95 8K

im not delid , I use IC7 paste

try a prime95 8K test, see if your close to mine
I7 6700K
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I7 6700k Gigabyte Z170x-UD5 Rx Vega 64 G.Skill Ripjaws F4-3200C16-16GVK 
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I7 6700K
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I7 6700k Gigabyte Z170x-UD5 Rx Vega 64 G.Skill Ripjaws F4-3200C16-16GVK 
Hard DriveHard DriveCoolingOS
Samsung 256 830 serie Samsung 500 850 serie M-2 Custom Water Loop , 2 GPU block , 1 CPU block, ... Win7 64 / Win 10 64 
MonitorKeyboardPowerCase
3X LG 24 inch (2ms) Logitech G810 XFX 1250W  Bitfenix Shinobi XL modded 
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post #4 of 12
I see that you didn't see OCN skylake thread yet

a137470f_power.png

It's normal. Linpack power usage is ridiculous compared to other programs, that's CPU-only load. It's because the performance goes up so much with avx2 and Haswell/Skylake run linpack twice as fast as previous comparable CPU's
Quote:
Hi, I have too high temps on my stock Skylake cpu i7 6700k.

You also don't state your voltage, that's very important because automatic volts can be very high. My 6700k uses a stock voltage of 1.32 at 4ghz, going to 1.42 with spikes to 1.46 at the 4.2ghz turbo under extreme loads if i leave it on default mobo settings! That is something that you should be monitoring and taking a lot of care over since the voltage used is very often 0.2 - 0.3v higher than neccesary.

My temperatures -dropped- a significant amout from stock to my 4.6ghz OC.
Edited by Cyro999 - 9/30/15 at 4:28am
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Hard DriveHard DriveCoolingOS
Old Seagate HDD Samsung 850 EVO Thermalright Silver Arrow SB-E SE Windows 7 Home Premium 64 bit 
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post #5 of 12
Thread Starter 
So which value for voltage I should set for stock cpu? Also should I turn on any OC functions for changing voltage for stock cpu?
post #6 of 12
Quote:
Originally Posted by Xender View Post

So which value for voltage I should set for stock cpu? Also should I turn on any OC functions for changing voltage for stock cpu?

1.1v works fine for me at 4ghz, 1.0v does not. The stock will turbo to 4.2, but then again your motherboard will override that and allow it to turbo with all 4 cores instead of just 1, it's best to just run all cores at the same manual maximum ratio.

I need 1.375 for 4.6ghz which is roughly normal, quite a few better chips out there.

stuff to change:

test
vcore
core/cache multiplier manually? cache a little lower than core is good when you're not sure what's stable
llc level 5

that's just to get started, you should see easy ~4.4 - 4.8ghz with temps of like 55-60c.

http://www.overclock.net/t/1570313/skylake-overclocking-guide-with-statistics/
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Hard DriveHard DriveCoolingOS
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post #7 of 12
Thread Starter 
Currently I am not going to OC, but I want lower voltages for stock cpu. Also turn on turbo on all cores (anyone know how to do that on Asus Z170 Hero)?
post #8 of 12
My advice, just set 1.15v in BIOS and leave it at that. Cyro will confirm that that number is OK (I am being very conservative, you could probably get away with less but seeing ss you don't want to overclock now I'm keeping it as simole as possible).
post #9 of 12
It's on unless you enable it. If you just want to run at 4.2ghz with all cores, manually set that i think. Try 1.25v with x264. If it passes a loop or two, try 1.2v then 1.15v

The cooling and mobo is really excessive for stock frequencies; my overnight encoding test w/ 100% load peaked 65c on the hottest core at 1.375v on air (with HT).
Edited by Cyro999 - 9/30/15 at 4:53am
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6700k Asus Maximus VIII Hero Gigabyte Aorus Xtreme 1080ti Corsair LPX 2x8GB 3200c16 
Hard DriveHard DriveCoolingOS
Old Seagate HDD Samsung 850 EVO Thermalright Silver Arrow SB-E SE Windows 7 Home Premium 64 bit 
MonitorKeyboardPowerCase
Asus PG258Q (240hz + Gsync) WASDKeyboards.com v1 semi custom w/ mx browns, ... Superflower Golden Green HX550 Air540 
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6700k Asus Maximus VIII Hero Gigabyte Aorus Xtreme 1080ti Corsair LPX 2x8GB 3200c16 
Hard DriveHard DriveCoolingOS
Old Seagate HDD Samsung 850 EVO Thermalright Silver Arrow SB-E SE Windows 7 Home Premium 64 bit 
MonitorKeyboardPowerCase
Asus PG258Q (240hz + Gsync) WASDKeyboards.com v1 semi custom w/ mx browns, ... Superflower Golden Green HX550 Air540 
MouseMouse Pad
Logitech G Pro Qck+ 
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post #10 of 12
Thread Starter 
And another question, is voltage regulation in Skylake works by offset like in sandy bridge?

So at stock settings all my cores in turbo reach 4200 MHz?
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