My information shows that 0960VR is only for use with the DSS9000 system. 0960VR isnt listed for the R840 in any configuration. #Iwork4Dell
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.  [URL] [URL]
R840 power supply compatibility