- Sep 8, 2019
- INTEL NUC8i7BEH - Bios 74
- Iris Plus 655
My NUC8i7 has been working well with Leesureone's EFI folder. The only issue ever since upgrading to Cataline, I have been having times when it randomly fires up the fan on full blast and then shuts off completely. I have finally identified that I was having horrible overheating issues. I just installed HWMonitors and it looks like just opening a couple browser windows open or with VMWare fusion open the CPU temps are over 95deg C. Its a fairly new device so not like it would have a bunch of dust. Any thoughts on this?
For reference, I have only 1 browser window open and CPU cores are at 100 or 95 degrees C. This is with tweaking the bios to limit heat by turning off performance settings.
The NUC's have a terrible reputation of running hot like ultrabooks. The i3's are not so bad but I have the i7 like you and in windows 10 the fans would spike like that. It is the turbo boost feature which gives high clock speeds for short periods of use. Thing is just browsing sets it off and I see 100 celcius regularly.
Go into bios F2 and click advanced. Then go to cooling tab and change dropdown from BALANCED TO QUIET as the option and it will keep the fan and cpu spiking like that. This is the official suggestion from INTEL btw. Search google "intel Nuc8i7beh high temps and fan noise" and you will find a LOT of posts on it.
The reason for the change in Catalina is I'm guessing turboboost was not working in Mojave as your CPU was not identified properly or something like that. The other reason is you might have updated your bios for the upgrade and they changed thermal and cooling defaults on the later bios'.
Now the other thing is every 12 months or so you have to clean the fan as it fills with dust.
IMPORTANT TEMP AND CLEANING INFO: The nuc's have a fault where dust gets caught between the fan and the heatsink on the cpu. Your CPU should be around 35 celcius when idle and nothing open. if you notice your base temps high all the time then you need to do the clean this post suggests. The NUC9's specs have been leaked and they have at least put TWO fans to cool the CPU's and better copper heatpipes so I hope they fix this.
You will start to have lockups and video stuttering etc when your cpu is too hot all the time.