Compaq ProLiant BL e-Class System Overview and Planning

Compaq ProLiant BL e-Class System Overview and Planning 32
Use Table 4 to calculate the de-rated power budget using the peak power from above.
Table 4. Example De-rating Worksheet
Maximum Rated Input Power (in Watts) for the
Base Configuration
Peak Power
ProLiant BL e-Class server blade enclosure 50 W
Add: RJ-45 Patch Panel power 25 W
Add: ProLiant BL10e server blade power:
Single server blade with 512-MB memory
x number of server blades
41.6 W
x 10 Server Blades
416 W 416 W
Total ProLiant BL e-Class system input power 491 W
Calculate the thermal dissipation x 3.41
Thermal dissipation for the desired configuration (in
BTUs)
1674 BTUs
Therefore, the new power budget for this configuration is 491 W (compared to the rated 1000 W),
and the thermal dissipation is approximately (491 × 3.41 =) 1674 BTUs/hour (compared to the
rated 3410 BTUs/hour).
This de-rated input power budget significantly reduces the power and thermal requirements for
highly populated racks, which reduces the number of PDUs for certain configurations. Fewer
PDUs increases deployment time and lowers costs. Costs for the facility electrical plumbing, data
center floor ventilation, and facility air conditioning installation can also be reduced.
Add together the input powers of the components that are included in your desired configuration.
The peak and typical input powers are listed in the table in Appendix A. Use Table 5 to calculate
the de-rated input power.
Table 5. De-rating worksheet
Maximum Rated Input Power (in Watts) for the
Base Configuration
Peak Power
ProLiant BL e-Class Server Blade Enclosure 50 W
Add: Interconnect Tray option power (RJ-45 Patch
Panel, RJ-21 Patch Panel or Interconnect Switch)
Add: ProLiant BL10e Server Blade power:
Single Server Blade (with XXX-MB)
x number of Server Blades x
Total enclosure input power
Calculate the thermal dissipation x 3.41
Thermal dissipation for the desired configuration (in
BTUs)