The M4 generation of IBM® System x® servers, featuring Intel® E5-2600 processors, brings compelling benefits to datacenters, even where existing servers are a just few generations old. Processor technology has progressed rapidly in the last five years. Not only has the performance of processors improved dramatically, but energy efficiency has also made a sharp leap as well. What this means is that IT managers should reassess all of the servers they currently have in their datacenters. Older servers may be paid for, but they can also be quietly costing money through excessive energy usage, management complexity, downtime, and server sprawl. Don’t let your precious IT dollars slip away.