Unlikely, Harvesting Methods like this are not used for high-priced chips.
They would try to sell the full chip in any case. The defect ones could still be sold in the desktop segment.
Maybe AMD is planning this, Komodo is labeled as 8core CPU in the roadmap pictures, i.e. one module is probably deactivated there.
The integration of PCIe will use up some die space, just have a look of the PCIe area of Intels 1155/56 chips. Now imagine that AMD will pack 32 Lanes in the chip, not only 16 as in Linnfield / Sandy, and we have quite a big area.
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