SunnyD
Belgian Waffler
If those specs are to be believed and the 5930k is indeed a 6c/12t part and the 5820k is also 6t/12t (not 4c/8t), then I would firmly expect them to do a bit more stripping out on the 5820k than just the PCIe bus. Expect it to have reduced functionality - probably missing VT-x and other associated instructions. There's no way that the 5820k SKU would hit an appropriate price point without more significant differentiation, otherwise Intel will sell few if any 5930k's.