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Only one core at 100% whenever downloading R7 1700X

Question asked by hellrider1984 on Aug 19, 2017

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?