Comparison of Sapphire Nitro+ Radeon RX 5700 XT 8G video card vs Gainward GeForce RTX 3090 Phantom video card by specifications and benchmarks. Sapphire Nitro+ Radeon RX 5700 XT 8G runs at 1.770 GHz+ 10 % base clock speed and has 8 GB of GDDR6 memory, while video card Gainward GeForce RTX 3090 Phantom runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 265 W+ 18 %, and the second is 370 W+ 6 %. Compare the table of benchmark results to find out which graphic card is better.