Ok got the R815 home - even got rails, has 2- Sammy 120g 850's, 4 - 600g intel SSD's, powered it up and went into the bios...
Here is the list .......
Dell PowerEdge R815
Bios 3.2.2
Memory 512gb ECC DDR3 - 1333 MHZ
Processors (4) AMD Opteron 6276 16mb Cache 16cores per proc @ 2.30ghz...