You have seen our reviews of the 6600K and 6700K, Intel however has not shared specifics of the architecture. Until today, over at IDF they have been talking quite a bit more about the processor. The 14nm Skylake die certainly is small.
We have a die block diagram that shows everything really, the iGPU space has increased heaps. You can spot the traditional design of two trows with two cores each sharing a L3 cache. The integrated iGPU has up-to 24 active execution units (EUs). This GPU supports DirectX 12 (feature level 12_1).
Have a peek, we will update our Core i5 6600K and Core i7 6700K reviews soon with info.