Comparison of ASRock Radeon RX 6600 Challenger D video card vs MSI GeForce GTX 1660 VENTUS XS 6G OCV1 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 MSI GeForce GTX 1660 VENTUS XS 6G OCV1 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 130 W+ 8 %. Compare the table of benchmark results to find out which graphic card is better.