Issue with Processor upgrade

[Blackfx01]

So I am working with a machinist motherboard with a 2011-3 cpu slot on it and I was trying to install a faster cpu in it.   The 2 processors I have are an E5 2640v3 and an e5-2699v3.   I am using these in a MACHINIST X99 LGA 2011-V3 Motherboard, Micro ATX Motherboard.   According to the Intel site the 2699 shows the following:

 

Intel® Xeon® Processor E5-2699 v3 

 

and the 2640 shows the following

 

Intel® Xeon® Processor E5-2640 v3

 

Both processors show they should fit the same slot but the processors are not the same size.   The 2699 will not fit.   Am I missing something? 

[Apemanonline]

If its not to late to send the mobo back for a refund these mad things have caused me nothing but greif there a whole slew of them and everyone in this part of asia are buying em thinking there a great deal.... There not. Ill list the issues if you want but that brands been nothing but trouble.

[Eigenvektor]

Both CPUs are E5 v3 and use the same FCLGA2011 socket, which the motherboard claims to support, so I don't see why it shouldn't fit. I'd blame the motherboard, never heard of that brand before either.

[Blackfx01]

So the processors are not the same size.  So how are they the same slot?