Comparison of Colorful GeForce GTX 1660 Ti SI 6G-V video card vs ASUS Dual GeForce RTX 2080 OC video card by specifications and benchmarks. Colorful GeForce GTX 1660 Ti SI 6G-V runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory, while video card ASUS Dual GeForce RTX 2080 OC runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 120 W, and the second is 215 W. Compare the table of benchmark results to find out which graphic card is better.