Comparison of MSI Radeon RX 580 Gaming 4G video card vs ASRock Radeon RX 6600 XT Challenger Pro 8GB OC video card by specifications and benchmarks. MSI Radeon RX 580 Gaming 4G runs at 1.257 GHz base clock speed and has 4 GB of GDDR5 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 185 W, and the second is 160 W. Compare the table of benchmark results to find out which graphic card is better.