Comparison of Colorful iGame GeForce GTX 1070 Ti Vulcan U Top-V video card vs KFA2 GeForce GTX 1080 Ti EX OC video card by specifications and benchmarks. Colorful iGame GeForce GTX 1070 Ti Vulcan U Top-V runs at 1.607 GHz base clock speed and has 8 GB of GDDR5 memory, while video card KFA2 GeForce GTX 1080 Ti EX OC runs at 1.531 GHz+ 3 % base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 180 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.