Comparison of ASRock Radeon RX 6900 XT Phantom Gaming D 16G OC video card vs PowerColor Radeon RX 6900 XT video card by specs and benchmarks. ASRock Radeon RX 6900 XT Phantom Gaming D 16G OC runs at 1.925 GHz+ 5 % base clock speed and has 16 GB of GDDR6 memory, while video card PowerColor Radeon RX 6900 XT runs at 1.925 GHz+ 5 % base clock speed and has 16 GB of GDDR6 memory. The weight is different, 1784 g vs 1500 g. 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.