Ethereum ~20 MH/s
Stats:
Per Month 11.25 ETH - $128.30
Your electricity rate per kWh?
Can't mine ETH.. It makes my computer laggy as f*ck. When writing letters come to screen after 2 secs, and mouse pointer is lagging too. Can't really do anything when mining eth.
5,79c/kWh
GPU mining is really a thing of past I would not invest much time as so many are pump/dump. If you already have gear... eth is going to be best option. But again I don't suggest GPU mining for most.
Buying new GPU's is expensive... and turning a profit is not easy like it was years ago where 3 month ROI's were almost guaranteed. Also I would not mine on a PC your using as you mention lag. Dedicated mining machine is more practical, due to high intensity needed in most cases.
you don't need to roi with gpu you sell them after they are not profitable, it's a win win condition, better than any asic crap