Hi,

The HD621 is equipped with 1.3 HDMI chipsets.
This version of HDMI supports 10.2 Gbps bandwidth.
There is no change in the bandwidth limitation with 1.4 version.

Ultra-HD blu-ray are 24 images/s and use a 4:2:0 10bits color subsampling.
With 10.2 Gbps bandwidth, the 1.3 version can handle 4k@30p 4:2:0.

Has someone done some tests with a UHD player and the HD621 to check its compatibility?

Serge.

G68ADV + HD621 (dead)
2xBSS 366
LCR Yamaha DSR112
4 Surround Presonus Eris E8
1 JBL 4645C sub and 1 DIY sub with WGTI15 woofer (Crest Audio 8001 amplifier)
3D-Lab Dvd Master/Panasonic BDT700/Panasonic UB420
JVC X7900