Comparison of GIGABYTE Radeon RX 6900 XT 16G video card vs KFA2 GeForce RTX 3080 12GB EX Gamer (1-Click OC) LHR video card by specifications and benchmarks. GIGABYTE Radeon RX 6900 XT 16G runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card KFA2 GeForce RTX 3080 12GB EX Gamer (1-Click OC) LHR runs at 1.260 GHz base clock speed and has 12 GB of GDDR6X memory. The TDP of the first video card is 300 W, and the second is 350 W. Compare the table of benchmark results to find out which graphic card is better.