Turned out it was bad CPU, specifically the memory controller. I got it to work by only populating certain ram slots NOT following the order in the manual. In my case, only filling slots to the left of the CPU (i.e A3,A4,A7,A8,A11,A12, and same numbers for B) Ultimately just replaced the CPUs with dual E5-2696v4 and they work great so far and all the ram slots work
Have a Dell PowerEdge r730xd upgraded from dual E5-2630v3 to dual E5-2697v4. Just changed cpus, nothing else. was working before. Cant get it to boot past "Initializing Intel QuickPath Interconnect" idrac works fine and I believe everything should be updated to support E5-v4 family have the dual 750w psu and the taller heatsinks idrac does still report the E5-2630v3 when go to hardware tab for some reason Please help [IMAGE] [IMAGE]  
r730xd hangs on "Initializing Intel QuickPath Interconnect" after CPU upgrade