Prezado Alejandro,

Este site pode lhe ajudar a medir o consumo dos equipamentos:
http://www.dell.com/calc

Segue link com os manuais em especifico de cada equipamento:

Servidor PowerEdge R420: http://www.dell.com/support/Manuals/us/en/19/product/poweredge-r420
Servidor PowerEdge R620: http://www.dell.com/support/Manuals/us/en/19/product/poweredge-r620
Servidor PowerEdge R720:<ADMIN NOTE: Broken link has been removed from this post by Dell>

Storage PowerVault MD3200: http://www.dell.com/support/Manuals/us/en/19/Product/powervault-md3200

OBS: Você deve entrar no "Getting Started Guide" e verificar as informações em "Technical Specifications".


Atenciosamente,
Rafael D.