I dont know why everyone is freaking out so much since almost all of these CPUs just look like Xeon E5 v4 with higher clock speeds at lower price overall all the specs already exist. Think about this for a minute
E5-2697 v4 18/36 (core/thread) 2.3-3.6ghz, 40 PCI lanes $2700
E5-2697A v4 16/32 (core/thread) 2.6-3.6ghz, 40 PCI lanes $2900
E5-2690 v4 14/28 (core/thread) 2.6-3.5ghz, 40 PCI lanes $2000
E5-2687W v4 12/24 (core/thread) 3.0-3.5ghz, 40 PCI lanes $2200
E5-2640v4 10/20 (core/thread) 2.4-3.4ghz, 40 PCI lanes $1000
So the chips listed above are broadwell not skylike we know the perfomance diff is not that huge beteen the two and its already 14nm. Next lets look at the price the differance to get a server cpu is going to be upto 1000$ more then the conumer one so your woundering where intel is saving money all these chips support dual socket so they remove that dual socket support and that drops the price also when you run dual sockets its super important that the cpu's are running at the same speed thats why you dont see over clocking on dual socket systems very much hard to get both chips to be at the same speed and both drop in perfect so now intel is able to do different changes to different chips to get them to the higher clock speeds lastly look at PCI lanes which you are woundering how they adding more lanes from. Well the trick is in the removal of support for dual socket now the lanes that were used for syncing the two cpu's to communicate with each other is not needed and those lanes go back to the CPU for normal devices And there you have it intel has had all of this for months and just did not share.