Comparison of ASUS TUF GAMING Radeon RX 6900 XT OC video card vs ASRock Phantom Gaming X Radeon VII 16G video card by specs and benchmarks. ASUS TUF GAMING Radeon RX 6900 XT OC runs at 1.900 GHz+ 4 % base clock speed and has 16 GB of GDDR6 memory, while video card ASRock Phantom Gaming X Radeon VII 16G runs at 1.900 GHz+ 4 % base clock speed and has 16 GB of HBM2 memory. The weight is different, 1700 g 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.