Comparison of Gainward GeForce GTX 1660 SUPER Pegasus OC video card vs Sapphire Radeon RX 6600 video card by specifications and benchmarks. Gainward GeForce GTX 1660 SUPER Pegasus OC runs at 1.530 GHz base clock speed and has 6 GB of GDDR6 memory, while video card Sapphire Radeon RX 6600 runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 125 W, and the second is 132 W. Compare the table of benchmark results to find out which graphic card is better.