Comparison of Sapphire Radeon RX 6900 XT video card vs MSI GeForce RTX 3070 Ti VENTUS 3X 8G video card by specifications and benchmarks. Sapphire Radeon RX 6900 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card MSI GeForce RTX 3070 Ti VENTUS 3X 8G runs at 1.580 GHz base clock speed and has 8 GB of GDDR6X memory. The TDP of the first video card is 300 W, and the second is 290 W. Compare the table of benchmark results to find out which graphic card is better.