Comparison of PowerColor Radeon RX 5600 XT video card vs ASRock Radeon RX 6600 XT Phantom Gaming D 8GB OC video card by specs and benchmarks. PowerColor Radeon RX 5600 XT runs at 1.130 GHz base clock speed and has 6 GB of GDDR6 memory, while video card ASRock Radeon RX 6600 XT Phantom Gaming D 8GB OC runs at 1.130 GHz base clock speed and has 8 GB of GDDR6 memory. The weight is different, -- vs 894 g. The TDP of the first video card is 160 W, and the second is 160 W . Compare the benchmark results to find out which video card is better.