I'm new to mining, and I currently have an ASUS P8Z77-V LK. I bought this motherboard in 2013 and was wondering if this board will support something like multiple GTX 1070s. Or what would be the best way to go about setting my gaming computer to mine when I'm not using it?

Should I use the current mother board I have or would it be better to upgrade? I currently use a GTX 760 and want to upgrade my GPU possibly to multiple GPUs but trying to figure out the best way to go about it. Thanks for any help...