Hi everyone, I just bought and installed a 3rd HD 7970 in my system (primarily for bitcoin mining, but also for games). I am now surprised to find out that my system is unstable. At first I assumed that my CPU overclock was affecting something with the new card, so I put the CPU back to stock settings. The system is stable now, but I don't think the CPU overclock was directly at fault. I plugged the system into my Kill-A-Watt meter, and the tower is drawing 1050W mining on the three cards (with CPU at stock settings and lightly loaded). I know the PSU has some conversion inefficiency, but this means it's at about 95% capacity, right? I bought my 1000W power supply three years ago and I supposedly thought it would be the last power supply I would ever need. But now I wonder if I need to get a larger power supply if I want to reinstate the CPU overclock. I'm just surprised that this situation came up and I want to make sure that I am on the right track before I put down the money to buy a larger supply. Does my system power draw make sense? I was considering the Seasonic X-1250 due to its stellar voltage regulation (voltage drops are very common where I live). I do not plan to add any more video cards or hard drives, just reinstate the CPU overclock. Do you think 1250W will be enough? Thanks for the advice in advance.