he right i was doing about the same with a 850 watt gold PSU i was hitting 562 watts at the wall with three 470 and one 480 but mine are modded to use less power and hash more i can probable get more out of them at a cost by max over clocking and hope i don't make them to unstable , il play it safe i found my sweet spot.
Strange. How come then I have 3x470 and 600W PSU wasn't enough for them? Maybe because I was also mining on CPU of this PC? Maybe should I try without loading up CPU miner?..
by using the CPU using to mine using software ?. . what software miners are you using ? .
try this if your using the nice hash miner that's what it sounds like your using ? .
https://bitcointalk.org/index.php?topic=1670733.0remember if there not tweak right thy can use more power at stock settings and hash slower . and 80 Bronze is rated lower then a 80 + gold PSU .