Comparison of ASUS Radeon RX 7900 XT video card vs GIGABYTE Radeon RX 6800 XT Gaming OC 16G video card by specifications and benchmarks. ASUS Radeon RX 7900 XT runs at 1.500 GHz base clock speed and has 20 GB of GDDR6 memory, while video card GIGABYTE Radeon RX 6800 XT Gaming OC 16G runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 300 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.