Comparison of Gainward GeForce GTX 1080 Phoenix GS video card vs KFA2 GeForce GTX 1080 EX OC video card by specifications and benchmarks. Gainward GeForce GTX 1080 Phoenix GS runs at 1.708 GHz+ 6 % base clock speed and has 8 GB of GDDR5X memory, while video card KFA2 GeForce GTX 1080 EX OC runs at 1.657 GHz+ 3 % base clock speed and has 8 GB of GDDR5X memory. The TDP of the first video card is 180 W, and the second is 180 W. Compare the table of benchmark results to find out which graphic card is better.