I just built a Ryzen system with an R7 1700X. Gigabyte aorus AX370 gaming 7 motherboard, Samsung 960 Evo NVMe m.2 ssd as main drive, 1 TB SATA III SSD as storage.
Anytime I download something, such as from the blizzard app or Steam, core0 is pegged at 100% usage and the entire system gets choppy / lags / apps freeze.
This occurs both when downloading to the m.2 drive and the regular sata drive. All other cores are at minimal usage (<5%) while core0 stays pegged at 100%.
Any ideas what is causing this?