Quote Originally Posted by Solus Corvus View Post
I disagree about die space. Reducing the width of the SP increases the ratio of logic per SPU. Without knowing more specific architectural details I'd guess 5D->4D is ambiguous or detrimental to die space.
Hm? How does logic go up? Logic should go down (minorly, 10-15% die size would be fortunate) and perf-logic ratio should get boosted just slightly less.

Unless it's WT-XT-YT-ZT which might be what you mean. That'd be quite an increase actually, but the ratio's way overdone.

I'm thinking of WXYZ + logic in the SIMD blocks that allows transcendentals to be performed through looping or such.