Newbie looking for mining tips relating to hardware

Hi only recently found a interest in mining and thought i would try it out with my PC. i have it set up right i think, in a pool on ethermine.org. I was interested in knowing how much you can get out of the GPU in terms of hash rate. I have a msi gtx 1070 and im currently getting 25 mhs. Is this the best i can get or are there methods of getting more out of system without building a rig dedicated to mining itself
thanks