Comparison of ASRock Radeon RX 6800 Phantom Gaming D 16G OC video card vs XFX Radeon VII video card by specifications and benchmarks. ASRock Radeon RX 6800 Phantom Gaming D 16G OC runs at 1.850 GHz+ 9 % base clock speed and has 16 GB of GDDR6 memory, while video card XFX Radeon VII runs at 1.400 GHz base clock speed and has 16 GB of HBM2 memory. The TDP of the first video card is 250 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.