Comparison of ASRock Radeon RX 6900 XT Phantom Gaming D 16G OC video card vs KFA2 GeForce GTX 1660 Ti White Mini (1-Click OC) 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 KFA2 GeForce GTX 1660 Ti White Mini (1-Click OC) 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.