Comparison of KFA2 GeForce GTX 1660 Super video card vs NVIDIA GeForce RTX 3090 Founders Edition video card by specifications and benchmarks. KFA2 GeForce GTX 1660 Super runs at 1.530 GHz base clock speed and has 6 GB of GDDR6 memory, while video card NVIDIA GeForce RTX 3090 Founders Edition runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 125 W, and the second is 350 W. Compare the table of benchmark results to find out which graphic card is better.