Here are 2 links.

2K video via HD621

4K video via HD621

The relative Youtube videos contain some explanations. Please note that AFAIK only one of the Oppo's HDMIs can output 4K. If we make the mistake of connecting the HD621 to the 2K output of the Oppo, regardless of the Oppo's setting we will actually see only 2K video. It is best to look at the PJ's Info menu to confirm the resolution of the video it is showing.

In summary, HD621 cannot handle 4K. Look at the pale colours, the artificats within the images etc. on my video. This is only what I captured on my phone; on the big screen it is worse.

Shankar

Note: 4k = 3840 x 2160

Last edited by Shankar; 2015-08-03 09:11.

Oppo UDP-203, Sonos, Nvidia Streamer, Fire TV 4K, Trinnov Altitude32 into Dan D'Agostino Momentum into Wilson Alexx, Paradigm Sub 1, Monitor Audio In Wall surrounds, JVC NX9