Comparison of AMD Radeon RX 6750 XT video card vs Sapphire Radeon RX 6800 video card by specifications and benchmarks. AMD Radeon RX 6750 XT runs at 2.150 GHz-2 % base clock speed and has 12 GB of GDDR6 memory, while video card Sapphire Radeon RX 6800 runs at 1.800 GHz+ 6 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 250 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.