Comparison of XFX Speedster MERC 319 Radeon RX 6900 XT Black Gaming video card vs MSI GeForce RTX 3090 Suprim 24G video card by specifications and benchmarks. XFX Speedster MERC 319 Radeon RX 6900 XT Black Gaming runs at 1.950 GHz+ 7 % base clock speed and has 16 GB of GDDR6 memory, while video card MSI GeForce RTX 3090 Suprim 24G runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 300 W, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.