Indeed the larger area will make up 4 a lot of it, otherwise we would proborably allready been discussing inlet designs to our directdie blocks instead of the numourous designs on normal block`s.
But I am looking forward to the results from
http://www.ocshoot.no `s tests
They are currently testing direct-HSF, by modifying an WC Antarctica. Those guys have a lot of experience with cooling (Normal Watercooling, direct die, direct TEC and so on).
Perhaps we are about to get an eye-opener?
http://www.ocshoot.no/antarctica_xtreeme1.htm