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Not all Xeons have virtualization support?

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Not all Xeons have virtualization support?
posted by Jean-Francois Panisset on July 18, 2016, 4:06 p.m. (2 days ago)
Was reading an article on NVMe drives on The Register and this tidbit caught my attention:

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As an aside, did you know that the 2685 v3s don't have hardware virtualization capability? Ability to turn off individual cores, but no virtualization extensions. This "metal only" CPU design is why...
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And indeed, comparing the E5-2685v3 and E5-2690v3:

http://ark.intel.com/products/81712/Intel-Xeon-Processor-E5-2685-v3-30M-Cache-2_60-GHz
http://ark.intel.com/products/81713/Intel-Xeon-Processor-E5-2690-v3-30M-Cache-2_60-GHz

The 2685 shows "No" for the various virtualization-related features. Possibly due to living in a cave, I had never heard of that: a bit of Googling hasn't revealed anything, has anyone seen a discussion as to why this is a thing? Or is it just some weird feature differentiation to pad out the Xeon product line? I guess for render farm applications it mostly doesn't matter...

JF

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Was reading an article on NVMe drives on The Register and this tidbit caught my attention:

===
As an aside, did you know that the 2685 v3s don't have hardware virtualization capability? Ability to turn off individual cores, but no virtualization extensions. This "metal only" CPU design is why...
===

And indeed, comparing the E5-2685v3 and E5-2690v3:

http://ark.intel.com/products/81712/Intel-Xeon-Processor-E5-2685-v3-30M-Cache-2_60-GHz
http://ark.intel.com/products/81713/Intel-Xeon-Processor-E5-2690-v3-30M-Cache-2_60-GHz

The 2685 shows "No" for the various virtualization-related features. Possibly due to living in a cave, I had never heard of that: a bit of Googling hasn't revealed anything, has anyone seen a discussion as to why this is a thing? Or is it just some weird feature differentiation to pad out the Xeon product line? I guess for render farm applications it mostly doesn't matter...

JF


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