Sorry if this has been addressed but I didn't find anything after searching.
I am planning a new build. I am likely going to get a 6950 for now with plans to upgrade to x3 Crossfire in a few months (I fear microstuttering). My question is what speed do I need on the PCI-E express lanes when selecting my mobo (i.e. how many 16x vs 8x vs 4x). Thanks in advanced.