IBM 74Y8421 server / storage / networking hardware Server Hardware / Parts

The IBM 74Y8421 is a processor voltage regulator module (VRM), CCIN 51CB, a genuine IBM component for the Power 720 Express server, models 8205-E4B and 8205-E6B. It converts the system’s main supply voltage down to the lower, tightly-regulated voltage the processor module actually runs on, fitted close to the processor socket it serves so that voltage delivery stays within tolerance under load. A VRM is a common failure point on Power-generation servers because it runs hot and switches continuously, and its failure symptoms (a processor that will not power on, or a system that reports a processor fault) can look like a CPU failure even though the processor card itself is fine. Genuine IBM VRMs of this kind are a routine requirement for restoring a faulted processor socket to service on an established Power 720 deployment. Specifiers should confirm their exact system model before ordering. Tech-Star (UK-based, shipped worldwide) supports ongoing server maintenance projects. Get in touch with our sales team for availability and a price.