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Win10 4K 60hz 10bit issue with RX550

Question asked by atticusmiles on Sep 5, 2020

Got myself a RX550 to go with a LG 27UL550 monitor. The monitor is a 4K 60HZ 10bit HDR10 Freesync monitor.  I can not run 4K 60hz on RX550, not matter on 8bit or 10bit, 30hz is fine. Borrowed a 5700xt and a RX590, and 4k 60hz works fine on 5700xt but RX590 shows the same problem. My system configuration is as follows:

 

CPU: Ryzen 3600

GPU: RX550

OS: Windows 10 19041450 up to date

driver: 2020.0826.1331.24343

monitor: LG 27UL550-W

link: DP 1.4

 

Feels like this could be  a driver problem, cuz the bandwith is not the problem.   could use some help here.

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