I understand it has hardware decoding for HEVC content but what about 10 bit? Will it smoothly run 1080 and 4K x265 10 bit content?
The HEVC/h.265 decode hardware is quoted as supporting 4:4:4 4096x4096 at 10-bit in specs I've seen reported elsewhere.
That should be fine for 3840x2160 4:2:0 10-bit consumer HEVC/h.265 as used on UHD Blu-ray etc. in decode terms.
(I don't think anyone would seriously now offer 8-bit limited UHD HEVC/h.265 decoding)