Comparison of Sapphire Radeon RX 6800 video card vs ASUS ROG Strix GeForce RTX 3090 OC White video card by specifications and benchmarks. Sapphire Radeon RX 6800 runs at 1.800 GHz+ 6 % base clock speed and has 16 GB of GDDR6 memory, while video card ASUS ROG Strix GeForce RTX 3090 OC White runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 250 W, and the second is 390 W+ 11 %. Compare the table of benchmark results to find out which graphic card is better.