Starting in August, part of the shroud of mystery around Larrabee is going to dissipate: A paper called 'Larrabee: A Many-Core x86 Architecture for Visual Computing' will be presented at SIGGRAPH by its authors, which include Doug Carmean, Tom Forsyth, Michael Abrash, Pat Hanrahan and many others.

The paper's abstract describes Larrabee as using 'multiple in-order x86 CPU cores that are augmented by a wide vector processor unit, as well as fixed-function co-processors. This provides dramatically higher performance per watt and per unit of area than out-of-order CPUs on highly parallel workloads and greatly increases the flexibility and programmability of the architecture as compared to standard GPUs.'

Source:→ Beyond3D