Comparison of ASRock Radeon RX 6600 Challenger ITX video card vs Palit GeForce GTX 1660 Dual OC video card by specifications and benchmarks. ASRock Radeon RX 6600 Challenger ITX runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory, while video card Palit GeForce GTX 1660 Dual OC 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.