I just got a new graphics card and wanted to install it, but how do i go about removing the drivers? I have an amd radeon hd 7770 and just got my r9 270x that i want to install. Also another question i got a modular psu as well, and my card needs 2x 6 pin connectors connected to it. My psu has a vga1, vga2, and vga 3. Would i use vga1 and vga2 to connect the card?