The APU does support 4k but as far as HDR at 60 FPS, I don't honestly know. Here is the review on that APU : AMD Announces New $55 Low-Power Processor: Athlon 200GE
This is a Low Cost APU with Vega 3 Graphics. The Graphics is not as powerful as some high cost APUs.
Here is 3DMARK Test results using the Athlon 200GE with Vega 3 : AMD Radeon Vega 3 Mobile video card benchmark result - AMD Athlon Pro 200GE,ASUSTeK COMPUTER INC. TUF B350M-PLUS GAMING
This website gives several 3DMark test results with FPS and other tests which might help in understanding the Vega 3 Graphics Specs: AMD Radeon RX Vega 3 GPU - NotebookCheck.net Tech
According to the Tests running HD Games, the maximum FPS for 1920 x 1080 is less than 29 FPS. Only 2 or 3 games had FPS higher than 25 FPS using the Vega 3 iGPU.
Were you able to find a solution for this? I am planning to build HTPC and I would like to know if this is solved before I choose my CPU.
I did some testing and I do not believe that it supports 4K HDR 60 FPS. If it's supposed to it's not stable. YouTube 4K 60 FPS works fine but when I tried watching 4K HDR 60 FPS sample videos Windows 10 would crash with a VIDEO_TDR_FAILURE error message. I tried watching them with VLC 3.0.4 and with Windows Media Player with HEVC Extension installed. Below were my system specs:
Radeon Software Version - 18.10.1
Radeon Software Edition - Adrenalin
Windows Version - Windows 10 (64 bit)
System Memory - 8 GB
CPU Type - AMD Athlon 200GE with Radeon Vega Graphics
Motherboard - Gigabyte B450 I AORUS Pro WiFi
Videos Tested Came From: