well the 750ti uses 60w or if you do some tweeking less. think one guy was still getting around 350-375 at 45w
heat wouldnt really be an issue.
how much wattage does a 300kh one of these use. have seen too many figures floating around to know what a single one of these does.
They use ~7w, depends on the efficiency of the power supply what the draw from the wall is. I was thinking the 750ti got around 300kh/s for 35-40w.
Heat is a HUGE issue. It's snowing outside and I have most of the windows open. Unless you have a large and cheap commercial space, you run into a wall where you either run out of cooling capacity or incoming power.