Comparison of ZOTAC GeForce GTX 1080 AMP Edition video card vs KFA2 GeForce RTX 3090 HOF Premium video card by specifications and benchmarks. ZOTAC GeForce GTX 1080 AMP Edition runs at 1.683 GHz+ 5 % base clock speed and has 8 GB of GDDR5X memory, while video card KFA2 GeForce RTX 3090 HOF Premium runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 230 W+ 28 %, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.