Comparison of Sapphire Pulse Radeon RX 5500 XT 8G video card vs Gainward GeForce RTX 3090 Phantom GS video card by specifications and benchmarks. Sapphire Pulse Radeon RX 5500 XT 8G runs at 1.607 GHz base clock speed and has 8 GB of GDDR6 memory, while video card Gainward GeForce RTX 3090 Phantom GS runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 135 W+ 4 %, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.