Comparison of Sapphire Nitro+ Radeon RX Vega 56 video card vs KFA2 GeForce RTX 3090 HOF video card by specifications and benchmarks. Sapphire Nitro+ Radeon RX Vega 56 runs at 1.266 GHz+ 10 % base clock speed and has 8 GB of HBM2 memory, while video card KFA2 GeForce RTX 3090 HOF runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 325 W+ 55 %, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.