Comparison of Sapphire Pulse Radeon RX 580 8G G5 video card vs KFA2 GeForce GTX 1660 Super X Edition (1-Click OC) video card by specifications and benchmarks. Sapphire Pulse Radeon RX 580 8G G5 runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card KFA2 GeForce GTX 1660 Super X Edition (1-Click OC) runs at 1.530 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 185 W, and the second is 125 W. Compare the table of benchmark results to find out which graphic card is better.