70c at idle, 98 at load

[garlfin1]

My CPU runs at 98c at load while my GPU runs at 70c  at load.  I already cleaned out all the dust in my computer, but the problem persists. 

[Grzwacz]

Hi,

70C graphics card temps are very good. The CPU is very high.

Check this HP Support video at YouTube https://www.youtube.com/watch?v=OSH-f3hwvio

Look at time stamps 46:09 and 47:54 for removing the CPU heatsink on an air or liquid cooler. You could try a new coat of thermal paste or replace the cooler with a better part.

[itsmyname]

@garlfin1 -- does your GPU have its own fan, mounted on its circuit board?  Is that fan dust-clogged?

Remove the side-panel, to view the inside of the computer, and then start-up your computer, and take a look, to ensure that the fan is spinning.  Also, does your computer have another fan on the "inside-back" of the case?  If so, is that fan also spinning?

Physically, is the computer located away from any wall or cabinet that restricts the exhaust-flow of hot air from inside your computer's case? If the hot air cannot be flushed, everything inside will be "hot".

[garlfin1]

The point is that my GPU is in an acceptable temperature range while I see my CPU hit temps of almost 100c. If my GPU can stay around 60-70c while under load, then the case airflow isn't the problem.

[itsmyname]

@garlfin1 -- CPU runs at 98c at load while my GPU runs at 70c  at load. 

>  If my GPU can stay around 60-70c while under load, then the case airflow isn't the problem.

But, if the CPU is that "hot", then airflow within the case, and/or new CPU heat-paste, is recommended.

[Grzwacz]

Hi @garlfin1,

I stand by my first response.

You stated you cleaned the internals so I did not identify this as a possible heat issue.

You need to reapply CPU thermal paste. Check temps.

Then you need to look at a better CPU cooling option. You need to extract heat from the CPU and move it out of the chassis to control temps. So the CPU cooler is not doing its job and/or you need better chassis airflow.

Having good graphics card temps suggests you need to fix the CPU cooling issue.

Regards

[garlfin1]

I believe you, I was replying to itsmyname. Do you know any parts that are compatible because I know this is a proprietary board.

[Grzwacz · Accepted solution]

Hi,

I have no hands on experience with your PC. I can't recommend a compatible CPU air or CPU liquid cooler without taking some measurements. @itsmyname might have a better handle on compatible replacement parts.

You have a 8700 so you should have a HP branded 65 watt TDP down draft air cooler now. I would first remove this cooler. Clean the CPU and the heatsink cold plate with 90% Isopropyl alcohol. Reapply a good non-conductive thermal paste to the CPU heat spreader such as Noctua, or Arctic MX-4, or Thermal Grizzly. Reinstall the heatsink/fan.

Check temps again. 

HP has a compatible 95 watt liquid cooler but HP Part Surfer lists this part as N/A (not available). Here is the part number:

Maybe you can find this part for sale at eBay or somewhere else. HP provides no details on this part. I would guess it is a 92 mm radiator and fan that must be installed at the rear of the case. I don't think you can do a 120 mm radiator in this case.

You might have to swap in a different MB backplate to attach this cooler to the MB. Some AIO liquid coolers require SATA power and a USB 2.0 connection to the MB.

I can't recommend a different retail CPU liquid cooler without knowing certain things.

This is all I can say at this point.

Regards.

[itsmyname]

@garlfin1 / @Grzwacz --  I don't think you can do a 120 mm radiator in this case.

Never say never.   🙂

A local "owner/operator" of a computer store takes the side-cover of a desktop PC, cuts a large hole in it, and mounts a 120 mm fan in the hole, with a protective grid on the exterior surface, to keep unwanted objects from touching the fan blades (ouch) while pulling warm air out of the computer's case.