Note Power from the standby output is available whenever input power is connected.

Calculating Power Consumption

A Sun Fire V100 server containing two disk drives has an estimated current requirement of approximately 1 amp.

TABLE A-3shows the estimated power consumed by the individual components in a fully powered system. However, when you are calculating the power requirements for your system, you must allow for 63 percent PSU efficiency. To perform this calculation, add the figures for each component installed in the system, then divide the result by 0.63.

TABLE A-3Estimated Power Consumption of Server Components

Component

Sun Fire V100

 

 

Base system

22.5W

Memory (per DIMM)

4.59W (256 Mbytes, burst mode)

Hard disk drive

6.5W (40 Gbyte/7200 rpm, idle)

 

 

Note To calculate the total power requirement for several servers installed in a single rack or cabinet, add the individual power requirement figure for each server installed.

Calculating Heat Dissipation

To calculate the heat generated by a server so that you can estimate the heat your cooling system must dissipate, convert the figure for the system’s power requirement from watts to BTU/hr. A general formula for doing this is to multiply the figure for the power requirement by 3.415.

118 Sun Fire V100 Server User’s Guide • December 2001

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Sun Microsystems Sun Fire V100 manual Calculating Power Consumption, Calculating Heat Dissipation