Comparison of ASRock Radeon RX 6600 Challenger D video card vs INNO3D GeForce GTX 1660 TWIN X2 VL 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 INNO3D GeForce GTX 1660 TWIN X2 VL runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 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.