Comparison of KFA2 GeForce GTX 980 Ti OC video card vs ZOTAC GeForce GTX 980 Ti AMP! video card by specs and benchmarks. KFA2 GeForce GTX 980 Ti OC runs at 1.025 GHz+ 2 % base clock speed and has 6 GB of GDDR5 memory, while video card ZOTAC GeForce GTX 980 Ti AMP! runs at 1.025 GHz+ 2 % base clock speed and has 6 GB of GDDR5 memory. The weight is different, -- vs --. The TDP of the first video card is 250 W, and the second is 250 W . Compare the benchmark results to find out which video card is better.