"Datacenters are set to standardize on the larger, 21-inch rack format by 2030, according to Omdia, as hyperscalers and server makers fully embrace it, leaving enterprises to the existing 19-inch standard. The analyst biz forecasts that the larger rack format, popularized by the Open Compute Project (OCP), will make up over 70 percent of kit shipped by the end of the decade, as it is increasingly adopted by vendors such as Dell and HPE that have been riding the AI infrastructure wave."
"The advantages of the larger format include better airflow for more optimal thermal management and the ability to fit larger fan arrays, while there is also more space for high-capacity power distribution and piping to enable direct-to-chip liquid cooling for AI-optimized infrastructure. It is also more future-proof because kit designed for the older rack format can be mounted into a 21-inch frame, but the reverse is not possible."
Datacenters are expected to standardize on the 21-inch rack format by 2030, driven by hyperscalers and server vendors while many enterprises remain on 19-inch racks. The larger format, popularized by the Open Compute Project, is projected to comprise over 70 percent of shipped equipment by decade’s end as major suppliers adopt it to support AI infrastructure. The 21-inch design improves airflow, enables larger fan arrays, and provides space for high-capacity power distribution and piping to support direct-to-chip liquid cooling. Backward compatibility allows 19-inch kit to mount in 21-inch frames but not vice versa, enhancing future-proofing. Rack-scale server designs that deliver pre-assembled racks to datacenters are becoming standard among cloud providers.
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