Originally Posted by ElementR
What do you think is the max safe voltage to fold at, with proper cooling of course?
I'm not sure, I'm thinking the VRM's are more likely to blow than the GPU.
My 580 folds at 975 mhz at 1.175v, and stays below 45ºC with water cooling of the GPU, and air cooling of the memory and VRM's using separate Swiftech GPU block and full cover heat sinks, with a medium speed Panaflow 120mm fan blowing air on the heat sink.
My experience with 580, much like I found with my 470 and 560 Ti, is that you hit a point where you need better than straight water cooling to get a higher OC well before you hit a point where the voltage you push through the card has any real potential to fry anything.
As things stand right now, pushing more than 1.175v doesn't help my OC at all because it makes the GPU run hotter, and at 975mhz it starts failing WU's if it gets up around 50ºC, regardless of the voltage I set it at.
With my 560 Ti, I was limited to about 1050 mhz on water cooling, but it would fold just fine at 1100mhz if I kept the GPU below 30ºC with chilled water.
I'm thinking of hooking my chiller up to the 580 to see if I can get it to fold reliably at 1000+mhz. I haven't done it yet because the chiller I built with scrap and spare parts is a bit inefficient, and uses nearly as much electricity as the video card does folding.