I've read so many responses on other threads asking this same question and they're almost the same answer every single time. "You can barely run it and absolutely no overclocking." I used Outervision's TDP calculator and it says the load wattage is 404W and it recommends a 450W PSU. With a little overclocking to the GPU, it goes up to 434W load and recommends a 500W PSU. I'm not sure who to trust.