You could order a system but without the graphics cards and then add your own (ie. the one you already have and get yourself another), I know some people have done that when PCS haven't got the specific graphics card that they wanted, or if you send them the graphics card(s) they can probably install it for you when building the machine - though I'd double-check on that one, I think they will do that, but it may depend on various things.Well the thing is I have a EVGA Superclocked Titan card atm and I want to go SLi but to do so I certainly need a need system but PCS don't stock EVGA cards or superclocked ones