its all 8 banks for the processors. its dual branch each with dual channel, in effect, quad channel. and now the cpus have their own link to the MCH unlike previous xeons which shared a bus. so its pretty nice. this board maxes out at 32GB. its pretty good except the MCH is passively cooled and gets kinda hot (45C ) so i had to screw that lil fan on there. the ESB2 southbridge and PXH also get pretty warm so ive gotta try and find more 40mm fans or a bigger heatsink for them. but i think ill be more creative with my other xeons, ill water cool it all. just need to find nocona waterblocks. any ideas where?