For testing power consumption, we took our test system and plugged it into a Kill-A-Watt power meter. For idle numbers, we allowed the system to idle on the desktop for 15 minutes and took the reading. For load numbers we ran Battlefield 4 at 1920×1080 and recorded the average idle reading and the peak gaming reading on the power meter.
Power Consumption Results: The system with the EVGA GeForce GTX 960 SSC 4G video card used the least amount of power at idle and topped out at 252 Watts peak load. The GeForce GTX 950 actually used more power than the EVGA GeForce GTX 960 at idle, but that is likely due to voltage differences and the fact that every GPU has different die leakage. The EVGA GeForce GTX 960 SSC 4GB used about 23 Watts more power than a GTX 950 since it had higher clock speeds, more CUDA cores enabled and twice as much memory.