As AI computing centers expand globally, high-density AI servers and rack clusters are becoming digital infrastructure staples. In this landscape, CRPS, 1U, and 2U are terms you cannot miss, yet they are often confused. The key is to realize they are simply hardware dimension standards defined by different metrics. Let’s break them down without the technical jargon.
CRPS (Common Redundant Power Supply) is an Intel-led specification for server power modules. With a unified form factor of 185mm × 73.5mm × 40mm, it fits perfectly into standard 1U/2U racks. By standardizing power dimensions and electrical specs across the industry, CRPS has solved the "compatibility headache" of varying interfaces and sizes, making data center maintenance easier than ever.
"U" is the standard unit for the vertical height of 19-inch rack equipment. Whether it is a server, switch, or storage unit, height is always measured in "U." 1U equals 44.45mm, while 2U equals 88.9mm. This is a universal standard applied across all brands. In short, 1U and 2U describe how much rack height a device takes up—it is a global benchmark for all rack-mounted hardware, not just power supplies. We have included a dimension guide below for your reference. When it comes to AI power, energy efficiency is key—check out our previous coverage on the 80 PLUS certification.
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