dc_in_datacentres

Study predicts 20% savings for DC-powered data centers

But note that the '20%' is compared to rather poor AC equipment

DC power worries data center planner

Rising temperatures could push more data centres to make the switch to direct current power-delivery systems.

DC in the data centre: can it save you money?

Document list from LBL. Many papers and presentations, mainly high voltage (380V).

Memo highlighting DC voltage level issue

This is a short critical assessment of the LBL Final report.

This web site describes two pioneering demonstrations - hosted by Sun Microsystems - one where direct current is distributed at the facility level to racks of computers that have been modified to directly accept high voltage direct current (DC) and another where the DC power conversion occurs at the rack level and DC is then directly distributed to servers within the rack. In typical data centers, the loss in electrical power through conversions of alternating current (AC) to DC to AC to DC occurs for all power flowing to the IT equipment.