Comparison of ASRock Radeon RX 6900 XT Phantom Gaming D 16G OC video card vs Colorful iGame GeForce GTX 1660 Ti Ultra 6G-V video card by specifications and benchmarks. ASRock Radeon RX 6900 XT Phantom Gaming D 16G OC runs at 1.925 GHz+ 5 % base clock speed and has 16 GB of GDDR6 memory, while video card Colorful iGame GeForce GTX 1660 Ti Ultra 6G-V runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 300 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.