Comparison of MSI Radeon RX 5500 XT Mech 8G OC video card vs GIGABYTE GeForce RTX 3090 GAMING OC 24G video card by specifications and benchmarks. MSI Radeon RX 5500 XT Mech 8G OC runs at 1.647 GHz+ 2 % base clock speed and has 8 GB of GDDR6 memory, while video card GIGABYTE GeForce RTX 3090 GAMING OC 24G runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 130 W, and the second is 370 W+ 6 %. Compare the table of benchmark results to find out which graphic card is better.