Comparison of Gainward GeForce GTX 1660 Pegasus OC video card vs ASUS ROG Strix GeForce RTX 3090 OC White video card by specifications and benchmarks. Gainward GeForce GTX 1660 Pegasus OC runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card ASUS ROG Strix GeForce RTX 3090 OC White 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 390 W+ 11 %. Compare the table of benchmark results to find out which graphic card is better.