Comparison of PowerColor Fighter Radeon RX 6600 video card vs Sapphire Radeon RX Vega 56 video card by specifications and benchmarks. PowerColor Fighter Radeon RX 6600 runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory, while video card Sapphire Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 132 W, and the second is 210 W. Compare the table of benchmark results to find out which graphic card is better.