https://forum.nvidia-arc.com/forum.php

An Iray client for C4D (R16 or R17 only) was released yesterday.

The Iray server (also in beta) has been available for a while...

(once you've joined the forum, just apply to join the beta program.)

the server in 'Queue' mode lets you put jobs onto a cluster of servers and let the network work through them. Or with the server in 'Interactive' mode you can fill a single machine with Quadro cards and get almost realtime rendering.

regards
prixat