Back in February, NVIDIA trotted out the very first desktop GPUs to feature its new Maxwell architecture: the GeForce GTX 750 and 750i. These entry level cards were paragons of efficiency, but they were hardly strong examples of what the company's latest graphics technology was truly capable of. No, NVIDIA revealed those graphics cards today -- the GeForce GTX 980 and 970 desktop GPUs. The new flagship GPUs still benefit from the efficiency gains made by the first generation Maxwell cards, but lean far more heavily on performance. If you're a PC gamer with a GTX 680 or 560 in your tower, these are the cards NVIDIA wants you to upgrade to.