Comparison of PowerColor Fighter Radeon RX 6600 video card vs GIGABYTE Radeon RX 6700 XT GAMING OC 12G 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 GIGABYTE Radeon RX 6700 XT GAMING OC 12G runs at 2.321 GHz base clock speed and has 12 GB of GDDR6 memory. The TDP of the first video card is 132 W, and the second is 230 W. Compare the table of benchmark results to find out which graphic card is better.