My E5-16xx-3 proc was volt-locked when I first installed it on a basic X99 mobo, but it responded well to the "Asus OC Socket" and BIOS built into my R5E.
I very much like the "Always Enable Turbo" option, 4.4GHz on a 3.2/3.8GHz part without any throttling.
The Xeon-grade iMC made my "mismatched" 64GB DDR4 work flawlessly at full XMP-rated speeds. Something I could never attain with my old i7-5960X proc.
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[/Korth]