Comparison of XFX AMD Radeon RX 570 RS 8GB XXX Edition video card vs ASRock Radeon RX 6600 XT Challenger D 8GB OC video card by specifications and benchmarks. XFX AMD Radeon RX 570 RS 8GB XXX Edition runs at 1.168 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ASRock Radeon RX 6600 XT Challenger D 8GB OC runs at 2.000 GHz+ 2 % base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 150 W, and the second is 160 W. Compare the table of benchmark results to find out which graphic card is better.