I don't know about the shim since I never saw anybody using this.
Does the CPU block hit some of the capacitors around the CPU socket or is everything fine there too?
as far as i can tell its not hitting any compactors on its way down.
so last night in a fit of desperation i removed the top vrm block and what would you know it fit! ( was able to put the vrm block on after the water block.)
with my eyes i dont see the top block interfering at all but i guess it does. maybe this mother board is slightly out of spec.
it explains why i was able to mount it when the water block slightly askew.
i still dont think it is seated 100% properly becuase tempatures are little bit high 80 degrees at 1.29v 4.6 ghz under gaming load so i bumped my system to 4.5 at 1.19v and its all good.
you might want to update the compatibility for this cooler and this motherboard or maybe mine is a little out of spec.