Comparison of ASRock Radeon RX 6600 Challenger D video card vs EVGA GeForce GTX 1660 SUPER SC ULTRA GAMING video card by specifications and benchmarks. ASRock Radeon RX 6600 Challenger D runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory, while video card EVGA GeForce GTX 1660 SUPER SC ULTRA GAMING runs at 1.530 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 125 W. Compare the table of benchmark results to find out which graphic card is better.