Hello, thanks for the reply. The 860m is a mobile GPU, so i'm assuming you are talking about a laptop. Typically, mining with laptops is not a good idea as these machines don't have the cooling in place to support the hardware running at max loads for an extended period of time. The GPU is also not very powerful, you'd make probably less then 50 cents a day. Bottom line, you'll probably end up killing your laptop before you get your money back.