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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.

It is better to make farm with a reserve power supply for future algorithms, which can be more demanding. This is usually done so, it is considered necessary power of consumers and mount a 20% of the stock. 6 cards x 150 = 900 + 100 (system)=1000 + 20%= 1200W will be good.

Ok, going for EVGA G2 1300W to be safe. Should set my mind to rest.

The 1300G2 is an amazing PSU but it only has 6 6+2 pin connectors and 2 6 pin connectors, if I remember correctly.

Correct (I have 20 of them). There are 6 PCI cables. All 6 have a 6+2 pin connector, 2 of those 6 *also* have another 6 pin connector.

I have an 850 G3 and 1000 G3 coming in on Thursday. I can report back on my experience pushing furys. You may be able to find a deal on 2 850s for close to the same price as a 1300 G2. Or pick up vga splitters.

Doesn't matter in my case since the 480s only require a single 8-pin (or 6+2)