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