Comparison of ZOTAC GeForce GTX 1080 AMP Extreme video card vs KFA2 GeForce RTX 3090 EX Gamer (1-Click OC) video card by specifications and benchmarks. ZOTAC GeForce GTX 1080 AMP Extreme runs at 1.771 GHz+ 10 % base clock speed and has 8 GB of GDDR5X memory, while video card KFA2 GeForce RTX 3090 EX Gamer (1-Click OC) runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 270 W+ 50 %, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.