Is this power supply, a 2000w platinum 0960VR / D2000E-S2 compatible with any R840?  

I couldn't find any specific information searching these forums, the R840 manual, or technical guide.  

https://dl.dell.com/topicspdf/poweredge-r840_owners-manual_en-us.pdf 
https://www.dell.com/learn/us/en/04/product_docs/poweredge-r840-technical-guide.pdf