Comparison of KFA2 GeForce GTX 1080 EX OC video card vs ZOTAC GAMING GeForce RTX 2080 AMP video card by specifications and benchmarks. KFA2 GeForce GTX 1080 EX OC runs at 1.657 GHz+ 3 % base clock speed and has 8 GB of GDDR5X memory, while video card ZOTAC GAMING GeForce RTX 2080 AMP runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 180 W, and the second is 225 W+ 5 %. Compare the table of benchmark results to find out which graphic card is better.