hi,
I suggest you try mining scrypt or X11
I'm also the NVIDIA GT 520, and using cudaminer as mining applications,
to find a nice pool that you can visit to various sources of information, and also find info-coin you want to mine in order to gain an advantage, I think 1.7 MH / s speed is pretty good.
good luck frien
That's 1.7 MH/s for Sha256. It would probably translate to 10 kh/s when mining scrypt.