Comparison of PowerColor Fighter Radeon RX 6600 XT video card vs Sapphire Pulse Radeon RX Vega 56 video card by specifications and benchmarks. PowerColor Fighter Radeon RX 6600 XT runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card Sapphire Pulse Radeon RX Vega 56 runs at 1.208 GHz+ 4 % base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 160 W, and the second is 280 W+ 33 %. Compare the table of benchmark results to find out which graphic card is better.