This Excel-based calculator provides a first-order estimate of the magnitude of the energy savings based on converting an AC-based powering architecture to a DC-based powering architecture for a rack of servers. Comments/Suggestions for improving this calculator are welcome.
Servers and other IT products in a data center run on low-voltage DC. The existing AC-based powering architecture in a data center requires multiple AC-DC-AC conversion that results in an overall system efficiency of AC-DC lower than 50%. A DC-based powering architecture reduces the number of conversion process and results in a better overall system efficiency.