Looking for used kepler cards. My server has a tx750m and a bfgr800wp psus, 3 pci-e slots with nothing to do. i will fold it. in return i need a gtx680 ref used card or whatever. i can sell my still under warranty 480, but probably no point.... i want to fold again, have the psus to do it, but i really need a video card for my main rig as i just lost a lot.... just went into debt for a new monitor for the tune of 400 bucks..... and lost a video card.... any help for an old, and possible future folder?