Well, good news, bad news.
Good news, received one processor as advertised.
Bad news, my test workstation is a Dell Precision T5810, with BIOS A34. With the processor, received a 2,7 amber flash code on the power LED. That error indicates "Memory modules are detected, but a memory power failure has occurred." Interesting, I'm running PC4-17000R memory which is allegedly supported:
Tried pulling all the memory out and using only one or two modules, but no luck there.
Pertinent to note I have the K240Y mainboard, not sure if that's older or newer than the HHV7N mainboard.
At this point, I know I may be on the outer edge of what Dell will support in the T5810... yes they support E5-v4 processors, but nothing absolute about the 2699... and who knows, maybe I do actually need PC4-19200R memory. So... sorry I can't give more concrete evidence, I don't have anything else that would support a v4 processor available to me at this time.