Comparison of ASUS Dual GeForce GTX 1660 TI OC video card vs Gainward GeForce RTX 3080 Phantom GS video card by specifications and benchmarks. ASUS Dual GeForce GTX 1660 TI OC runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory, while video card Gainward GeForce RTX 3080 Phantom GS runs at 1.440 GHz base clock speed and has 10 GB of GDDR6X memory. The TDP of the first video card is 120 W, and the second is 370 W+ 16 %. Compare the table of benchmark results to find out which graphic card is better.