Comparison of ASUS ROG Strix Radeon RX 6600 XT OC video card vs ZOTAC GAMING GeForce GTX 1660 SUPER Twin Fan video card by specifications and benchmarks. ASUS ROG Strix Radeon RX 6600 XT OC runs at 2.000 GHz+ 2 % base clock speed and has 8 GB of GDDR6 memory, while video card ZOTAC GAMING GeForce GTX 1660 SUPER Twin Fan runs at 1.530 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 160 W, and the second is 125 W. Compare the table of benchmark results to find out which graphic card is better.