got a network card for a m8s comp putting it in i came accross a wire in the packing 3single core wires that can attach to the nic and then to somthing else now in the contents this wire dont exist in the instructions this wire dont exist and it works with out its suposed to connect to something but never came accross one of these before

It is called a WOL (Wake-On-Lan) Cable. You connect the cable to your motherboard (if supported) and then you can power on your computer.

intresting not needed one of them before for that anoying feature