Ok, trying it. I'm using a pretty heavily modified 590.48.01 to be able to use those 48G 4090s, they work but they do require a bit of handholding. The main problem is the BAR1 just isn't large enough, it's capped at 32G.

Heh, got it working, thank you so much!!

Overall 30% reduction in wall clock time, that's pretty neat (and I'm still not running this at full power but 450 W is a bit much for that puny connector).