1 Performance and energy savings calculations are based on actual SPEC results and IBM estimate of SPECint_rate2006.

Rack to blade comparisons:

2010 HS22/HS22V to a 2005 xSeries 346 2U rack server SPECjbb2005 ratio = 23.1-to-1

2010 HS22/HS22V to a 2006 System x3650 2U rack server SPECjbb2005 ratio = 7.95-to-1

Blade to blade comparisons:

2010 HS22/HS22V (SPECint_rate2006) vs. 2005 HS20 (IBM estimate of SPECint_rate2006) ratio = 18-to-1

2010 HS22/HS22V vs. 2007 HS21 XM (SPECint_rate_base2006) ratio = 6.65-to-1

Source: www.spec.org (link resides outside of ibm.com). SPEC and SPECint are trademarks of the Standard Performance Evaluation Corporation (SPEC).

2 Using a 22.11-to-1 performance ratio of today’s HS22/HS22V to a 2005 xSeries 346 2U rack server, 1 BladeCenter H chassis containing 14 HS22V blades would provide the computing performance of approximately 310 2U rack servers. 1 BladeCenter H chassis containing 14 HS22V blade servers consumes an average of 4,382W. 310 2U rack servers consume 119,040W. Thus, the energy savings for replacing 310 x346 2U rack servers with 1 BladeCenter H chassis is 96.3%.

3 Data center floor space cost estimate used is $500 per square foot, average 8 square feet per standard enterprise 42U rack. IT footprint compares 1U per rack server vs. 0.5U per HS22/HS22V blade. 14 HS22/HS22V blades in 7U (.17 of one 42U rack) BladeCenter E chassis provides equal or greater performance than 310 x346 2U rack servers inside 14.76 rack enclosures, for a savings of 14.59 racks or 99%. In terms of floor space that would save approximately 117 sq. ft. (613U). (Realistically, in most data centers 2U rack servers cannot be populated that densely, due to air flow and power issues. So the IT footprint savings would be even greater for BladeCenter E.)