Comment Re:why would you OC enterprise CPU's? (Score 1) 339
I think this is precisely they point. This is a business decision to prevent people from buying cheap unlocked desktop CPUs with VT-d, overclocking them, and say, using them to run their dev/test QA VM environments - hell, even production environments if you're really pinching pennies. If you want to get really "out there", it's possible that there was pressure from hypervisor vendors for Intel to lock this down so that they didn't have to support the random failures that can occur with overclocking.
Intel (backed potentially by hypervisor vendors) is basically saying "You can either buy a desktop CPU and run VMs on it, but no overclocking that stuff for free performance / headache causing problems"