Comparison of ASRock Radeon RX 6700 XT Challenger D 12GB OC video card vs GALAX GeForce GTX 1660 Super video card by specifications and benchmarks. ASRock Radeon RX 6700 XT Challenger D 12GB OC runs at 2.330 GHz base clock speed and has 12 GB of GDDR6 memory, while video card GALAX GeForce GTX 1660 Super runs at 1.530 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 230 W, and the second is 125 W. Compare the table of benchmark results to find out which graphic card is better.