Comparison of Colorful GeForce GTX 1660 NB 6G-V video card vs ASRock Radeon RX 6500 XT Challenger ITX 4GB video card by specifications and benchmarks. Colorful GeForce GTX 1660 NB 6G-V runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card ASRock Radeon RX 6500 XT Challenger ITX 4GB runs at 2.200 GHz base clock speed and has 4 GB of GDDR6 memory. The TDP of the first video card is 120 W, and the second is 107 W. Compare the table of benchmark results to find out which graphic card is better.