Comparison of KFA2 GeForce GTX 1070 EX Black Edition video card vs GALAX GeForce GTX 1660 Prodigy video card by specifications and benchmarks. KFA2 GeForce GTX 1070 EX Black Edition runs at 1.518 GHz+ 1 % base clock speed and has 8 GB of GDDR5 memory, while video card GALAX GeForce GTX 1660 Prodigy 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.