don't mind the outerlines, they are rough dimensions of my maybe to-come WB
dia is 6.1mm, well, u'll see
edit: i presume you are talking socket a dimensions (u r always talking cost effectiveness, lol, athlon is the way to go)
taken a bit from here:
http://www.dansdata.com/images/coolercomp/holes500.gif
and from here
http://forums.procooling.com/vbb/sho...es+motherboard
took me about 2 hrs to find that info (was looking for xact same thing today)