Comparison of Gainward GeForce GTX 1070 Phoenix video card vs Colorful GeForce GTX 1660 NB 6G-V video card by specifications and benchmarks. Gainward GeForce GTX 1070 Phoenix runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Colorful GeForce GTX 1660 NB 6G-V runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 150 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.