Yes, but 13% faster than 1.6 GHz GTX 980 TIwrong calculcations.
1080 runs at stock 1.6, boost 1.73 and a lot of time it runs at higher 1.86 ghz.
(2100/1860 - 1) * 100% = 13 %, surprise.
155 FPS vs 136 FPS
Hmmm, nope. Actual figures for that OC of GTX 980 TI water force is 1492 MHz.
So 2114 MHz 2560 CUDA core GPU is 13% faster than 1492 MHz 2816 CUDA core GPU. Yeah, IPC has decreased.