Comparison of GIGABYTE GeForce GTX 1070 Xtreme Gaming 8G video card vs ASUS Dual GeForce GTX 1660 OC EVO video card by specifications and benchmarks. GIGABYTE GeForce GTX 1070 Xtreme Gaming 8G runs at 1.670 GHz+ 11 % base clock speed and has 8 GB of GDDR5 memory, while video card ASUS Dual GeForce GTX 1660 OC EVO 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.