Comparison of MSI Radeon RX 5700 XT Mech OC video card vs Sapphire Pulse Radeon RX 6600 video card by specifications and benchmarks. MSI Radeon RX 5700 XT Mech OC runs at 1.670 GHz+ 4 % base clock speed and has 8 GB of GDDR6 memory, while video card Sapphire Pulse Radeon RX 6600 runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 225 W, and the second is 132 W. Compare the table of benchmark results to find out which graphic card is better.