not trying to say asus board wount work they released a new bios for your delux , but it don't say xeon just newer i7
X99-DELUXE BIOS 3004
Support the latest Intel® Core™ i7 X-Series processors.
File Size
8.06 MBytesupdate 2016/04/13
now asrock board bios states '' Support 2016 Q2 coming new CPU. '' ???
to me I would wait and see if the update the supported CPU list and add the new V4 chips in it cause as of now there not listed as supported chips ..
[no V4 chips listed ]
https://www.asus.com/us/Motherboards/X99DELUXE/HelpDesk_CPU/
same here
http://www.asrock.com/mb/Intel/X99%20WS/?cat=CPU
so for me its hard to use a chip that's not officially listed and for there cost not worth the risk until they do so
of course that's just my opinion