Guys I got 1500W power supply and RIG is drawing 1400W, should I add another 750W power supply to power motherboard and the 1500W for the GPUS? Anyone got experience with this? I don't like to load my power supply with more then 80%, I feel if I keep it running at 90 or 95% will will get fried in a couple of days.
PSUs are rated by DC power output so a 1500W PSU supplying 1500W would be drawing ~1700W AC power from the wall depending on efficiency. 1400W from the wall means the PSU is supplying ~1250W = 83% of 1500W.