Comparison of XFX Radeon RX 5600 XT Thicc III Pro video card vs MSI Radeon RX 6600 XT MECH 2X 8G video card by specs and benchmarks. XFX Radeon RX 5600 XT Thicc III Pro runs at 1.130 GHz base clock speed and has 6 GB of GDDR6 memory, while video card MSI Radeon RX 6600 XT MECH 2X 8G runs at 1.130 GHz base clock speed and has 8 GB of GDDR6 memory. The weight is different, -- vs 721 g. The TDP of the first video card is 160 W, and the second is 160 W . Compare the benchmark results to find out which video card is better.