Comparison of Sapphire Nitro+ Radeon RX 6800 video card vs GALAX GeForce RTX 3090 HOF Premium video card by specifications and benchmarks. Sapphire Nitro+ Radeon RX 6800 runs at 1.850 GHz+ 9 % base clock speed and has 16 GB of GDDR6 memory, while video card GALAX 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 250 W, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.