I have a gtx 660 i want to use 2 monitors i got a dvi witch works fine but can't get the 2nd screen to work i tried a dvi-d converter and just tried hdmi but nothing i went in to the control panel but my computer only sees one screen witch is on the dvi can somebody please help my motherboard is a H61MLB Ver. 6.x my video card is a nvidia msi twin frozr gtx 660