Can someone tell me the Max power draw for a stock Rx 480 4GB? Trying to figure out a PSU for a 6 x 480 rig.
Use nominal values from datasheet for this purpose (=150 W) and add proper headroom for overclock, spikes and working point at good efficiency.
So a gold rated 1200W PSU for 6 x 480 + MB with Celeron-CPU and risers/SATA should be just fine in other words. Even without undervolting.
Would be too close for me. To max out the cards under all conditions my bet would be more at 1600W. You do not want to run the PSUs the whole time at nearly full load, even if it might work for a surprisingly long time with high quality models.
But that's one of the reasons I don't build rigs with more than 4 GPUs. It's much better to handle while having a greater and cheaper selection of components.
Edit: and I already tried and "grilled" a number of them...