Comparison of ASRock Radeon RX 6900 XT OC Formula 16GB video card vs GIGABYTE GeForce GTX 1660 SUPER GAMING 6G video card by specifications and benchmarks. ASRock Radeon RX 6900 XT OC Formula 16GB runs at 2.125 GHz+ 16 % base clock speed and has 16 GB of GDDR6 memory, while video card GIGABYTE GeForce GTX 1660 SUPER GAMING 6G runs at 1.530 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 125 W. Compare the table of benchmark results to find out which graphic card is better.