Comparison of XFX Radeon RX 5700 XT Thicc III video card vs ASRock Radeon RX 6600 XT Challenger Pro 8GB OC video card by specifications and benchmarks. XFX Radeon RX 5700 XT Thicc III runs at 1.670 GHz+ 4 % base clock speed and has 8 GB of GDDR6 memory, while video card ASRock Radeon RX 6600 XT Challenger Pro 8GB OC runs at 2.033 GHz+ 3 % base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 225 W, and the second is 160 W. Compare the table of benchmark results to find out which graphic card is better.