Comparison of ASUS TUF Gaming X3 GeForce GTX 1660 Advanced video card vs Gainward GeForce RTX 3090 Phantom GS video card by specifications and benchmarks. ASUS TUF Gaming X3 GeForce GTX 1660 Advanced runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card Gainward GeForce RTX 3090 Phantom GS runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 120 W, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.