How To Correctly Size Power Requirements For Server Racks?

The server world is now rapidly developing, making servers themselves faster and sophisticated. This might influence the rack colocation, so the business owners can find it challenging to determine and size right a server rack power. The essential thing of any server is the power supply unit (PSU), but how to utilize it properly to achieve the needed power for server rack? In this article, let’s discuss how much power a server rack uses and what considerations related to the power supply for the server you should consider.

How much power does a server rack consume?

The electrical power available for devices and racks is commonly measured by wattage (kWh or MW). A standard server rack requires around 7kW for effective work. However, the high-density server racks need more electrical power supply – approximately between 25 and 40 kW.

How to evaluate your approximate power distribution needs

When your company decides to colocate the IT infrastructure using the data center’s services, you need to understand that your hardware will represent only a small percentage of the entire infrastructure. Since then, every software and application in the IT environment has required a certain amount of electricity. A data center is responsible for managing power effectively to ensure business continuity and performance.

Power usage effectiveness (PUE) used by data centers determines how much electricity the computing equipment utilizes – this result is represented as a ratio. Typically, ineffective power distribution has an impact on the overall PUE level, decreasing it. Data centers now have power distribution units (PDU) that distribute electrical power throughout the whole IT infrastructure in a data center to solve this issue. PUE is responsible for supplying power to server racks too.

1. Evaluate the power usage for the present and the future

Determining how much electricity is needed for server racks is essential since the power distribution units have a longer life cycle than a typical server. The lifecycle of a server is about 3-5 years, while PDUs stay alive longer. This way, you should make sure that a particular data center’s PDUs are versatile to cope with different software or hardware and meet the future requirements of IT infrastructure as well.

2. Consider power ratings

Remember that the most important factor of PDUs is the power ratings, apart from other features. Their purpose is to provide power to specific computing equipment. You should know whether the data center’s infrastructure will cope with the collocated assets. Besides, the essential indicator of PDUs is the voltage that measures the total power available for devices. At the same time, amperage determines the amount of energy that can be accommodated by one unit.

3. Focus on a certain PDU type

It is important to know what type of units a data center uses to meet your power requirements. For instance, basic units are primarily responsible for supplying power to small server rooms, and the monitored ones go to the high-density facilities and infrastructures that require high performance.