Comparison of ASRock Radeon RX 6700 XT Phantom Gaming D 12GB OC video card vs PowerColor Liquid Devil Radeon RX 6900 XT Ultimate video card by specifications and benchmarks. ASRock Radeon RX 6700 XT Phantom Gaming D 12GB OC runs at 2.457 GHz+ 6 % base clock speed and has 12 GB of GDDR6 memory, while video card PowerColor Liquid Devil Radeon RX 6900 XT Ultimate runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 230 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.