Afterburner might be a solution to tweak a setting or 2. I've gotten mine setup for my 980 ti, added 150 mhz on the core, not on mem because it does nothing in my case. Result 550 to 600 sol/s. adding more voltages or mhz doest do much either. Key might be that i keep it cooled very well. which results in good card performance.

My 980TI (8 GB) has about 550 sol/s. Seen it spike to 600 sol/s.
Only using it for ZCash as eth is not profidable at all to mine with this card. 

I have been testing the settings in Afterburner to see results and ended up with
allowing it to use up 90% of maximum power and never reach over 80 celcius.
Core 150 mhz, total 1250 mhz
mem 75+
these gave the best results so far.
tho if anyone has reached better sol/s with this card i am interested in your settings.

for the sake of results i could run it to test (k/m)h/s

Isn't it the standard .bat except using userName.workerName instead of a wallet address?