Comparison of GIGABYTE Radeon RX 6900 XT Gaming OC 16G video card vs MSI GeForce RTX 3090 Suprim X 24G video card by specifications and benchmarks. GIGABYTE Radeon RX 6900 XT Gaming OC 16G runs at 1.875 GHz+ 3 % 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 340 W+ 13 %, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.