IBM Intel Xeon L5609 4C 1.86GHz 12MB Processor Option for System x3550 M3 (feature 4597)

The L in L5609 stands for low power, and the numbers back it up: the IBM Intel Xeon L5609 4C 1.86GHz 12MB Processor Option (MPN 59Y4003) is rated at just 40W. It has 4 cores at 1.86GHz and 12MB of cache.

A 40W rating is useful where an IBM System x3550 M3 sits in a power- or cooling-limited rack. The tradeoff is clock speed. Memory speed is listed at 1066 MHz.

The feature code is 4597. Match it against your configuration sheet before ordering.

Refurbished units are covered by a choice of 1 year or 3 years of warranty. Used units carry 90 days. Request pricing with your quantity.

The 12MB cache is large for a 40W part, which helps data-heavy workloads keep more of their working set close to the cores. It is a sensible fit for dense racks, small server rooms and sites paying close attention to the electricity bill.