Comparison of ASRock Phantom Gaming X Radeon VII 16G video card vs Sapphire Toxic Radeon RX 6900 XT Air Cooled video card by specifications and benchmarks. ASRock Phantom Gaming X Radeon VII 16G runs at 1.400 GHz base clock speed and has 16 GB of HBM2 memory, while video card Sapphire Toxic Radeon RX 6900 XT Air Cooled 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 400 W+ 33 %. Compare the table of benchmark results to find out which graphic card is better.