Comparison of ASRock Radeon RX 5500 XT Challenger D 4G OC video card vs GALAX GeForce GTX 1660 EX White (1-Click OC) video card by specifications and benchmarks. ASRock Radeon RX 5500 XT Challenger D 4G OC runs at 1.685 GHz+ 5 % base clock speed and has 4 GB of GDDR6 memory, while video card GALAX GeForce GTX 1660 EX White (1-Click OC) runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 130 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.