CPU Heat sink specs for the Dell Precision 5820 Workstation with Intel Xeon CPUs

I am upgrading my CPU from a Xeon W-2155 to a Xeon W-2295 on my Dell Precision 5820 Workstation. Some articles online mention this cannot be done as I need a new motherboard, but Dell support assures me that my service tag does support it. I think it will work because I got the workstation with a 950W PSU to begin with. Also, Dell support assures me…