Comparison of MSI Radeon RX 5700 Mech GP OC video card vs ASRock Radeon RX 6600 XT Phantom Gaming D 8GB OC video card by specifications and benchmarks. MSI Radeon RX 5700 Mech GP OC runs at 1.515 GHz+ 3 % base clock speed and has 8 GB of GDDR6 memory, while video card ASRock Radeon RX 6600 XT Phantom Gaming D 8GB OC runs at 2.064 GHz+ 5 % base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 180 W, and the second is 160 W. Compare the table of benchmark results to find out which graphic card is better.