Based on IBM Study. The virtualized system count and energy savings were derived from several factors: A performance factor of 2.79X was applied to the virtualization scenario based on SPEC® results source: www.spec.org. System p 570 (16-core, 8 chips, 2 cores per chip, 4.7 GHz) SPECint_rate2006: 466, as of 8/20/2007; HP Integrity rx7640 (16-core, 8 chips, 2 chips per core, 1.6 GHz) SPECint_rate2006: 167 as of 8/20/2007. A virtualization factor of 3X was applied to the virtualization scenario using utilizations derived from studies conducted by Alinean available at www.ibm.com/services/us/cio/optimize/opt_wp_ibm_systemp.pdf (PDF, 74 KB). A factor of 2X was used to represent the ability to install two 16-core System p 570 systems in a single rack. Power consumption figures of 5600 W for the IBM System p570 and 2128 W for the HP rx7640 were based on the maximum rates published by IBM and the typical maximum power consumption published by HP. Source for the HPIntegrity rx7640 information is QuickSpecs HP Integrity rx7640 Server dated August, 2007.