IBM BladeCenter servers Designed to help deliver exceptional performance per watt.

Since the initial launch of IBM IBM has worked closely with both ® BladeCenter® servers, IBM has been and AMD, in addition to leveraging our focused on helping IT improve power own IBM PowerPC® technology, 0.35 and cooling in the . By to offer some of the industry’s most 0.30 0.25 leveraging some of our mainframe heritage power-efficient processor technologies. 0.20 and experience, IBM has designed a 0.15 blade chassis that takes advantage For integer applications, IBM delivers 0.10 0.05 of exceptional efficiencies in our exceptional performance compared to Dell 0.00 power supplies, in addition to offering and Hewlett Packard (HP) offerings for Integer/Watt outstanding cooling. both single- and dual-core processors. IBM HS20 DC 2.0 GHz Intel ULP IBM LS20 DC 2.2 GHz (68W) HP BL35p DC 2.2 GHz Opteron (68W) HP BL45p DC 2.6 GHz Opteron (95W) Dual core HP BL25p DC 2.2 GHz Opteron (95W) Power per SpecINT Dell 1855 DC 2.8 GHz Intel Xeon The alternatives blade in W rate Int/W Figure 1. Power consumption

IBM BladeCenter HS20 DC 2.0 GHz Intel Xeon® ULP 150 57.9* 0.386

IBM BladeCenter LS20 DC 2.2 GHz Opteron (68 W) 227 65 0.286

HP BL35p DC 2.2 GHz Opteron (68 W) 290 66.8 0.23 0.14 0.12 HP BL45p DC 2.6 GHz Opteron (95 W) 735 155 0.21 0.01 HP BL25p DC 2.2 GHz Opteron (95 W) 350 67.6 0.193 0.08 0.06 Dell 1855 DC 2.8 GHz Intel Xeon 439 58.9 0.134 0.04 0.02

0.00 Single core Integer/Watt

Power per SpecINT IBM JS21 SC 2.7 GHz PowerPC The alternatives blade in W rate Int/W IBM HS20 SC 3.8 GHz Intel Xeon Dell 1855 SC 3.8 GHz Intel Xeon IBM BladeCenter JS21 SC 2.7GHz PowerPC 302 38.5 0.127 HP BL20p SC 3.8 GHz Intel Xeon HP BL60p SC 1.6 GHz Intel IBM BladeCenter HS20 SC 3.8GHz Intel Xeon 340 43.1 0.127 Figure 2. Integer performance per watt Dell 1855 SC 3.8 GHz Intel Xeon 392 42.3 0.107

HP BL20p SC 3.8GHz Intel Xeon 433 42.3 0.097

HP BL60p SC 1.6 GHz Intel Itanium® 400 33.4 0.083 For floating point applications, IBM also delivers competitive performance as compared to 0.30 HP blade offerings. 0.25 0.20 Power per SpecINT 0.15 The alternatives blade in W rate Int/W 0.10 0.05 IBM BladeCenter LS20 DC 2.2 GHz Opteron (68 W) 227 66.6 0.293 0.00 Floating point/Watt IBM BladeCenter HS20 DC 2.0 GHz Intel Xeon ULP 150 30.9* 0.206 IBM LS20 DC 2.2 GHz Opteron (68W) HP BL35p DC 2.2 GHz Opteron (68 W) 290 55.3 0.19 IBM HS20 DC 2.0 GHz Intel Xeon ULP HP BL35p DC 2.2 GHz Opteron (68W) IBM BladeCenter JS21 DC 2.5 GHz PowerPC 359 58.8 0.163 IBM JS21 DC 2.5 GHz PowerPC HP BL25p DC 2.2GHz Opteron (95 W) 350 55.7 0.159 HP BL25p DC 2.2 GHz Opteron (95W)

Figure 3. Floating point performance per watt Sources: 1) Dell, HP and IBM online power-configuration tools with a configuration of 2 processors, 8 GB memory and a 36 GB drive. 2) source: www.spec.org/cpu2000/results/cpu2000.html

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