CPU overheating even when in bios

Natto

Hello,

Over the past few days I've notice fps dropping while gaming and saw that my cpu temp was about 90 °C. I have recently cleaned my pc since my cpu started overheating even when in bios and it forces my pc to shut down because of this.

I have completely dissasembled my pc and cleaned each component with compressed air. Applied new thermal paste to the cpu since it was while from the last time I applied new thermal paste. The thermal paste I have used is CORSAIR TM30.

When loading back in and left it to idle in the bios and it would slowly increase temp for 50°C to 85-90°C then shut down since it overheated, after waiting a few hours to try again and reseated the AIO pump. It stayed at around 85°C while in the bios, not sure if that is good in general. I was able to leave it idle and load into windows operating system.

I checked in task manager to see the cpu speed and it would be around 3.5GHz-3.6GHz, I don't know if it good for the cpu to be at that speed when idle. Also it would still be around 85°C while idle and not running any aplications at all.

I'm currently trying to figure out the cuase and came here to get a second opinion as well as possible solutions.

PC BUILD:

Motherboard: ASUS B550-F ROG Strix Gaming (WiFi) AMD AM4 ATX Motherboard

CPU: AMD Ryzen 9 3900x 12-Core Processor

RAM: G.Skill Ripjaws V 32GB (2 x 16GB) DDR4-3200 PC4-25600 CL16 Dual Channel Desktop Memory Kit F4-3200C16D-32G

GPU: EVGA NVIDIA GeForce RTX 3060 Ti

Storage: WD Black SN750 1TB M.2 NVMe Interface PCIe 3.0 x4 Internal Solid State Drive with 3D TLC NAND (WDS100T3X0C)

Cooling System: MSI MAG Core Liquid 360mm aRGB Water Cooling Kit

PSU: PowerSpec 750 Watt 80 Plus Gold ATX Fully Modular Power Supply

Case: Lian Li Lancool II Tempered Glass eATX Full Tower Computer Case - White

PowerSpec_MikeW

@Natto

First thought would be your AIO pump isn't running. Check the header the pump is connected to in the BIOS to confirm.

Natto

I checked in the BIOS, the pump is connected and running.

PowerSpec_MikeW

@Natto

Touch the tubes coming out of the pump while the PC is on, see if you can actually feel them moving water. If that's good, check the thermal paste spread on the CPU after you reapplied.

Natto

@PowerSpec_MikeW

I checked and I can feel some moving water. I swapped the aio with the heatsink that came with the cpu and the temps went back to normal. Also checked the thermal paste after I reapplied, it felt and looked dry compared to the thermal past that was already applied to the heatsink. Are there other methods to check if the aio pump is working properly? Also, are there other types of thermal paste that is better than the one I have already purchased?

PowerSpec_MikeW

@Natto

Better is relative. Use thermal grizzly kryonaut extreme, but the difference between a decent paste and the best is 1-3c typically. It sounds like there's something going on with the mounting pressure. I'd like to see the thermal paste spread.