Comparison of Sapphire Radeon RX Vega 64 video card vs KFA2 GeForce RTX 3090 EX Gamer (1-Click OC) video card by specifications and benchmarks. Sapphire Radeon RX Vega 64 runs at 1.247 GHz base clock speed and has 8 GB of HBM2 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 295 W, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.