Comparison of Sapphire Nitro+ Radeon RX 6900 XT SE video card vs MSI GeForce RTX 3090 Suprim X 24G video card by specifications and benchmarks. Sapphire Nitro+ Radeon RX 6900 XT SE runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card MSI GeForce RTX 3090 Suprim X 24G runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 363 W+ 21 %, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.