Hi,
I'm curious as to which E5-26xx v2 CPU upgrades are possible in the Mac Pro 6,1. Is every non ES cpu supported? For example, the E5-2696 v2 has the same CPUID as the E5-2697 v2, but I have not seen any reports of anyone trying this CPU.
However, it is possible to spoof your computer on Geekbench, so it's possible that every single one of these is a Hackintosh whose owner has spoofed them to report as MP6,1.