Damn! Went from total ~450 Sols/s on previous version to ~650 Sols/s on 2x Asus STRIX-GTX980Ti. Stock memory settings.
Edit: ... and running two threads provides a 6% boost (~40 sols/s). I can't get my GPU memory clock to OC in the Asus GPU tweak - any suggestions? I change the value, hit accept, and it changes back to the default value.
Thats because Maxwell cards have issues with Windows 10 and P2 state regarding memory overclocking.
You can force P0 state by running nvidiasetp0state.exe that resides in root folder of official Nicehash mining tool.
Then you will be able to OC memory.
Or you can use Nvidia Inspector and OC memory there my selecting P2 state in drop-down menu of its overclocking panel.