Comparison of ASUS TUF Gaming Radeon RX 7900 XT OC Edition video card vs ASRock Phantom Gaming X Radeon VII 16G video card by specs and benchmarks. ASUS TUF Gaming Radeon RX 7900 XT OC Edition runs at 1.500 GHz base clock speed and has 20 GB of GDDR6 memory, while video card ASRock Phantom Gaming X Radeon VII 16G runs at 1.500 GHz base clock speed and has 16 GB of HBM2 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.