Engineered with the needs of enterprise organizations in mind, the IBM x3950 M2 provides a scalable, efficient and highly reliable solution. The x3950 M2 can help organizations meet business demands with confidence, and since many organizations require servers that expand as business grows, the x3950 M2 provides the flexibility to run more applications on the same piece of hardware. These features deliver an optimized solution for large database enterprise application and virtualization services.This machine comes with a 4-socket license of Windows Server 2003 R2, Datacenter Edition.