Every so often they do something in a firmware update that makes the clock more accurate, but it’s not great. Mine’s about 2.5-3 minutes behind now, and I last set it… I don’t remember… maybe a couple months ago? Dunno, I gave up on the console clock and use the clock on the computer I’ve got for dLive Director and WWB and such.
I keep hoping they’ll either add an NTP client to the board or add an option to Director to sync the computer’s clock to the MixRack’s clock, but it’s either not in the cards or A&H has had more important things to do.