Sorry, I didn't follow what you meant about the 2 core bump on the new entry model? Are you referring to the dual core MP here?
No. Sorry, I got throw by intel's clever (*cough* inconsistent) number scheme. I was thinking "60" got you a core count bump along with the 2 core bump on the 5645.
I suspect they don't really have much expectations at all for the single package model's prospects. That's why there are only two. At least the duals are a bit more viable during the interim. There is nothing close to them on very high RAM and core count workloads in the Mac market. (for those who want to stay inside the walled garden. )
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I did not realise there were no plans to update the chipset.
Intel didn't do updates the last two tick/tock cycles.
I suppose it is not impossible, but I don't consider it likely. That is not how server vendors roll. Stability and correctness over the "latest greatest" general market box I/O socket for keyboards and thumb drives.