At this point I do not have the information handy but let me research and I will be back soon with more information.
Hi Kevin, thanks let me know if you find it then.
There should be a comparison table, it would be helpful ! ...especially since the new requirements for Windows 8.1.
Thanks for waiting. LAHF and SAHF are part of Intel Virtualization Technology (Intel VT-x). For Xeon CPU’s, VT-x was introduced with the Clovertown family. You can a list of Clovertown CPU’s here:
These CPU’s launched starting in 2006 and any cpu (xeon or Core) that supports VT-x will support LAHF/SAHF; however, it is important to mention that not all Xeon or Core (1st gen, 2nd gen, 3rd gen, 4th gen) support VT-x.
In regards the PrefetchH it is supported in all Xeon CPU’s.