Perfect, that helped a lot! Much easier and effective way to adjust the settings. I've just installed gpu-z, and found out it's a Samsung GDDR5 6 Gb memory set.
Yeah, then ETH mining is probably the best way to go for you. Samsung memory usually overclocks a lot better than Hynix and Micron, and that's what matters the most for ETH algo. Plus it doesn't care as much about the core clock and the power consumption is on the low side in general. Download the latest version of nvidia profile inspector, set "CUDA - Force P2 State" to "Off" (it'll help to get rid of the unwanted memclock jump when you close the miner), set the core voltage to 0.8V and start overclocking the VRAM. You should get 20-23 MH/s out of your card. Though of course watch out for temps, that's the main issue in your setup.