Comparison of ASUS ROG Strix Radeon RX 6600 XT OC video card vs Gainward GeForce RTX 3080 Phantom 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 Gainward GeForce RTX 3080 Phantom runs at 1.440 GHz base clock speed and has 10 GB of GDDR6X memory. The TDP of the first video card is 160 W, and the second is 340 W+ 6 %. Compare the table of benchmark results to find out which graphic card is better.