[hara]

Cathar. I couldn't sleep last night, and I thought of an Idea. Since your design cools the cpu directly above the core, maybe 1mm to each side, a way to further degrease temps is to optimise it to specific processor core families. This has the disadvantage of making the block suitable for one cpu type. The Idea I had in mind is to make available a set of gaskets which one could fit between the top and middle plate to "seal off" holes that are outside the core area. In this way, users have the choice to cool what's needed and since some holes are sealed, the cross sectional area decreases and the water velocity increases where it is most useful. These guaskets could make the block more future proof. This is the idea (holes in red region covered):

The only disadvantages I thought of is that pressure drop of the block varies with each processor and you'd make people mess with the block.

The guaskets needn't be made out of rubber since it's not like we're making something leak proof