Hello, I have an actual p5n-mx asus motherboard with a ati sapphire x1550. I have a dual core 2.2 processor and 4 gb RAM. I can't play some good graphics 2009 or later games. Probably is my video card that is old. Now i know for surely i got a pci and pci xpress x1 and pci xpress x16 in my motherboard. I don't know though if it can support a pcie 2.0 or 2.1. I am having a look on ebay but most good and not expensive video cards work with pcie 2.0. Can anyone tell me if it will fit my motherboard?