I've just built a Zen 4-based PC for gaming and productivity (various productivity tasks), with the following main components:
CPU: Ryzen 9 7900X,
Motherboard: MSI X670E Gaming Plus WiFi,
RAM: 2 x 32GB DDR5 RAM,
GPU: RTX 3080 10GB,
PSU: 1000w 80+ Platinum,
AIO: ID-Cooling FX 360 Pro 360mm,
Storage: 2 x 2TB NVMe SSDs, etc.
I believe I've gotten everything under control temperature-wise, as the system idles at around 45°C and 85-87°C when running a multi-core Cinebench 23 / 24 30-min stability test when using the AIO's default thermal paste (I may change this when I've sorted out the below query).
The real question I have is about the motherboard settings for the MSI X670E Gaming Plus WiFi, that would lead to a more stable idle, as I'm still finding what is supposed to be an idle state, there are minor CPU spikes when I look in the Task Manager, that range from about 7 - 15%, which in turn doesn't allow the chassis fans to reach a state of idle when not doing anything on the PC.
The main thing I enabled is AMD EXPO for the RAM, enabling PBO for overall performance.
I've checked and disabled/removed any unnecessary bloatware and ran malware scans to be safe, but the system has the behaviours described above (minor CPU usage spikes).
In comparison to a previous PC build I still use, which runs an ASUS ROG STRICK B550-A motherboard + Ryzen 9 5900X CPU, and reaches an idle state of 1%, with minimal BIOS tweaks apart from ensuring the RAM runs at the maximum speed. This leads me to believe I've not set up the motherboard BIOS settings correctly for the X670E.
Any other tips specific to this motherboard + CPU combo for recommended BIOS settings would be much appreciated.
And please be specific with responses for the use case described above, so that I can implement them easily.
