Hey there, i just received my new processor, an Intel i5 2500k, 8GB's of Kingston RAM and my new monitor, an Asus 24". For my video card i was thinking of a an ATI 7870, but it's PCI-E 3.0 (Don't know what that means lol ) so i'm wondering if an Asrock Z77 Pro3 will support this, also does anyone know if it supports crossfire? Thanks in advance.