Comparison of GIGABYTE Radeon RX 6600 XT Gaming OC 8G video card vs MSI Radeon RX Vega 56 8G video card by specifications and benchmarks. GIGABYTE Radeon RX 6600 XT Gaming OC 8G runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card MSI Radeon RX Vega 56 8G runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 160 W, and the second is 210 W. Compare the table of benchmark results to find out which graphic card is better.