What's the bare minimum spec for smooth 4K video playback?

[Arterion]

I have an old USFF with a 7th gen i5 and 8GB RAM which sometimes gets a bit stuttery when playing 4K .mkv files via VLC.

 

[Arterion]

Do you know what codec it uses?

What % of use is the IGP versus the CPU?

Will need to check this, thanks!

 

[Arterion]

also what cable type are you using?
iirc, hdmi on the 7th gen igpu will only do 4k @ 24hz/fps
you'd need to connect via display port for 4k @ 60hz/fps

it's HDMI, so that may explain it. The PC has a DP, but the TV doesn't. Or can that be adapted at the other end?