Selecting the right server rack requires considering factors like the number of servers, energy efficiency, and future deployment needs. Understanding kilowatts per rack (kW/rack) is important for businesses using colocation. Just like virtual CPUs (vCPUs) relate to physical CPUs in cloud computing, kW/rack defines power use per server rack. Understand the Basics Server Rack A rack is the framework — typically 19 inches wide — that houses multiple servers stacked. Server racks are open frames or cabinets designed for mounting, organizing and securing EIA-standard 19-inch width rack-mount IT and A/V equipment such as servers, routers, hubs, switches and audio/video components, regardless of the manufacturer. They also provide cable management and enable. To help data center architects and IT staff in those duties are modern server racks, ranging from inexpensive simplified units to fully integrated cabinets with hot-swappable capabilities and air-conditioned enclosures. These two rack types serve distinct roles inside data centers and server rooms, and understanding their technical differences helps align your hardware strategy with.