Comparison of ASUS TUF GAMING Radeon RX 6900 XT TOP Edition video card vs XFX Radeon RX 7900 XT video card by specs and benchmarks. ASUS TUF GAMING Radeon RX 6900 XT TOP Edition runs at 2.135 GHz+ 17 % base clock speed and has 16 GB of GDDR6 memory, while video card XFX Radeon RX 7900 XT runs at 2.135 GHz+ 17 % base clock speed and has 20 GB of GDDR6 memory. The weight is different, -- vs --. The TDP of the first video card is 300 W, and the second is 300 W . Compare the benchmark results to find out which video card is better.