Im building a computer for a friend and on a low budget and im buying him this motherboard http://uk.asus.com/Motherboards/AMD_AM3/M4A77TD_PRO/ it says 2x pic-e one running at x16 and one at x4, can someone explain what the speed difference is in % and i plan to use crossfire can someone tell me if its worth using crossfire too? thank you
The % you lose in the 4x slot depends on what card you are using but around 5% on a mid range card. Crossfire is not worth using on a low budget build but not because of the slot. Also consider Intel Pentium gxxx series are better for a budget build than AM3.
It would be better to get a single more powerful card instead of crossfire with that mobo, less headaches.