True, but it's price/performance that I think most of us are concerned about: http://www.anandtech.com/show/2978/amd-s-12-core-magny-cours...

We're also now in a leapfrogging situation, where year by year this may change. AMD is one process node behind Intel; I'm not sure how to count microarchitectures, but ignoring processor interconnects (which Intel has only just started to address by copying the AMD approach) if you consider Core to be more advanced than K8 and Nehalem more than K10 then AMD is also one microarchitecture behind.

I found it really odd how much the MC scores increased relative to the Xeon in the one Linux benchmark they ran. Maybe there's something about the that Windows handles NUMA that doesn't agree with AMD's system?