Comparison of ASUS Expedition Radeon RX 570 OC video card vs ASRock Radeon RX 6600 Challenger ITX video card by specifications and benchmarks. ASUS Expedition Radeon RX 570 OC runs at 1.178 GHz+ 1 % base clock speed and has 8 GB of GDDR5 memory, while video card ASRock Radeon RX 6600 Challenger ITX runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 150 W, and the second is 132 W. Compare the table of benchmark results to find out which graphic card is better.