Comparison of ASUS Dual Radeon RX 6600 video card vs ASRock Phantom Gaming X Radeon VII 16G video card by specifications and benchmarks. ASUS Dual Radeon RX 6600 runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory, while video card ASRock Phantom Gaming X Radeon VII 16G runs at 1.400 GHz base clock speed and has 16 GB of HBM2 memory. The TDP of the first video card is 132 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.