Which configuration is essential for ensuring optimal server power efficiency in a datacenter?

The selection of balanced power distribution among installed servers is essential for ensuring optimal server power efficiency in a datacenter. This approach allows for an even load across the power infrastructure, which helps to prevent power surges and reduces the risk of overloading any single circuit. By distributing power evenly, the datacenter can maintain stable operating conditions, enhance reliability, and prolong the life of electrical components.

Effective power distribution also minimizes energy waste and can optimize cooling requirements. When servers are not balanced, some power sources may become inefficient or fail, leading to increased operational costs and potential downtime. Therefore, maintaining balance in the power distribution not only improves efficiency but also supports the overall stability of the datacenter environment.

In contrast, the other options would not necessarily lead to optimal power efficiency. For instance, using power supplies greater than the server maximum requirement could lead to wasted capacity, and minimizing the number of active networking devices may not directly affect the power efficiency of servers. Additionally, utilizing long power cords tends to introduce inefficiencies and potential voltage drops, which can further compromise the power management efficiency within the datacenter.