Comparison of PowerColor Fighter Radeon RX 6600 video card vs GIGABYTE GeForce GTX 1660 TI OC 6G 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 GeForce GTX 1660 TI OC 6G runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 132 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.