i7 8700K running hot on custom water cooling?

hughythomas

hughythomas

hughythomas

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Hi chaps,

I have a hackintosh build here that I use for music production every day.

I recently upgraded to:

  • ASUS Z370-A PRIME
  • 16GB 3200 DDR4
  • i7 8700K @ 4.7Ghz (1.36v)
  • Phanteks Glacier CPU block
  • Fractal Design Define S
  • EK Coolstream PE 360 (roof)
  • Alphacool Nexxxos XT45 240 (front)
  • Scythe GT 120mm fans 1850rpm (3 on top rad 2 on front)
Do these temps seem high to you? I can't seem to lower the voltage any more or Intel Burn Test does not complete without restarting the machine.

Best Wishes,

Tom

PLB191J.png
 
Last edited:
yeah seems a bit hot, try this settings:
1. Load line calibration level 6
2. manual voltage (fixed) 1.27v
3. VCCIO 1.05v
4. VSA 1.05v
5. XMP enabled
6. Sync all cores: 47
7. The rest on auto
 
Delid will knock 15-20c off immediately.

The voltage on auto is a little over zealous, that could explain the temps
 
Yep, VID is over 1.4. Did Vcore stop at 1.36 or go higher?

Those temperatures are acceptable for that voltage I'd say, but then it's not the highest clock speed and there's an 11 degree difference between cores. I'd say it's ripe for a delid - you might not lose 20° but it will help a lot.

Also with that much rad space and no GPU I'm surprised temps are this high, so that also points to the delid being worthwhile. My 4690k and 1070 have 4 fans worth of rad space and cap out at 53°, well below 1000RPM. Are you running the fans on full at those temperatures?
 
hughythomas said:
Guys thank you kindly for the replies - I forgot to mention theres a 1080 Ti in the loop as well but it never goes above 43c on load!
Click to expand...
If that's the case then it implies the CPU is trapping heat under/in the heatspreader. What temperature does it land at if you remove the load quickly? Does it drop from 80 to 70, or right down to about 50-55? If the GPU is at 43 then the water is cooler than that, so 30-40 is a big delta just in the CPU block and IHS assembly.

Is the block mounted well?
 
BTVA said:
yeah seems a bit hot, try this settings:
1. Load line calibration level 6
2. manual voltage (fixed) 1.27v
3. VCCIO 1.05v
4. VSA 1.05v
5. XMP enabled
6. Sync all cores: 47
7. The rest on auto
Click to expand...

Thank you for your settings mate - it seems my CPU needs a bit more juice to become stable at 4.7Ghz. I've set it at 1.290v in the BIOS (and also applied those other settings as you said).

Here is where we are up to now:

i3JpwCy.jpg

i3JpwCy
 
LuckyBenski said:
If that's the case then it implies the CPU is trapping heat under/in the heatspreader. What temperature does it land at if you remove the load quickly? Does it drop from 80 to 70, or right down to about 50-55? If the GPU is at 43 then the water is cooler than that, so 30-40 is a big delta just in the CPU block and IHS assembly.

Is the block mounted well?
Click to expand...

Hi LuckyBenski thank you for your reply - the CPU goes pretty much straight away back to around the 50 mark then declines from there rapidly back to idle which is 30c.

Its a phanteks glacier cpu block that I fitted about 2 months ago and is securely mounted on the CPU with their own thermal paste applied.
 
next step you could try to change the command rate (CR) to 1T, in the bios the option shows 1N instead, and lower the Row refresh cycle time (tRFC) to something less than 320. These settings could help the system run a little bit more efficiency and faster. But for the moment, the setting is solid for daily use.
 
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