New i9-9900KF is running at 100C

opienick · March 23, 2021

Hey guys. Just upgraded to an i9-9900KF and it's running... HOT (100C). I put it in and I noticed the temperatures were pretty hot while on the BIOS (65C), significantly hotter than my i7-9700K at idle. Well, my BIOS wasn't updated so my computer locked up on the windows screen. Here's where we find out it's specific to the CPU.

I put my i7 back in, it's running at it's default temps that I was used to seeing, 43C, in the BIOS. Flashed my BIOS, reinstall the i9. I make it through the Windows screen, SUPER HYPE because it's working, then I get a thermal alert. I immediately open my temp software and see it's at 100C while my computer is simply starting up my background programs, Discord, Chrome, ETC.

The cooler is a 2015 Cooler Master H60 (at least I think that's what it's called and I put 2015 because I know there's a new version out). I've never had any problems with it, it kept my 4790K cool, and it kept my 9700K cool.

Thermal paste is the ARCTIC MX-4. Applied generously and I have checked to make sure it spread. It has and the whole CPU is covered.

I've linked a video of the temps while my PC is performing startup.

I'm out of ideas. I've checked voltage, clock speeds, etc. Running fan at 100% on the cooler doesn't stop it from breaching 90s and up to 100.

Please help.

Mister Woof · March 23, 2021

5 year old 120mm AIO - probably not really gonna cut it.

I would try any stock intel coolers laying around to see if you get better performance.

ShadowChaser · March 23, 2021

if you have multicore enhancement or an equivalent turned on in bios, I'd try turning it off first. The 9900K is also a hot chip so while a 120mm may be alright for a 9700K it is definitely getting slaughtered by a 9900K once you put any load on it.

I'd also check your mounting pressure - a thinner application of TIM might actually be better at showing you if anything went wrong during the mount.

Definitely invest in a better cooler, though.

opienick · March 23, 2021

Thanks guys. Bought this- Cooler Master MasterLiquid LC240E RGB Close-Loop AIO CPU Liquid Cooler, 240mm Radiator

Seems like it's strong enough after some basic research. I would've never thought that it was my cooler because I've never had any past problems.

BTW, for all you cooling nerds, I did a CPU-Z stress and it went from 54 to 100C in two readings (about 2 seconds)
I find that kind of thermal energy quite fascinating lol

unclewebb · March 24, 2021

@opienick Your video shows your CPU hitting 94C when power consumption is only 40W. Either your pump is not plugged in or it is broken or it is not sitting square on your CPU. Temps core to core are all very similar so it is likely the pump or the mounting pressure is not enough.

Try running HWiNFO64 to confirm your temperatures.