Comparison of ASRock Radeon RX 6800 Challenger Pro 16G OC video card vs Colorful iGame GeForce GTX 1660 Ultra 6G-V video card by specifications and benchmarks. ASRock Radeon RX 6800 Challenger Pro 16G OC runs at 1.750 GHz+ 3 % base clock speed and has 16 GB of GDDR6 memory, while video card Colorful iGame GeForce GTX 1660 Ultra 6G-V runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 250 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.