You either listed your video card wrong or have no clue what the actual specs are.
Without that information nobody can answer your question.
the 1080Ti came with 11gb of GDDR5X memory, I dont think any of the 10 series Nvidia cards ever came with 4gb of RAM.
Apologies typo there... it is the NVIDIA GeForce GTX
1050 Ti
Go to
https://whattomine.com/Put 1 under 1050Ti and look at the results
Most profitable coin is ETH and you will make around $0.44 USD per day before any power costs. Power shouldn't be too high since it uses very little electricity.
So if you already got the GPU, mine away, but if you want more speed, you need at least an 1070 or 1080 or so. If you like AMD, then get the RX 470/570 which should get you 30MH/s.