Site preparation guide HP Z800 Workstation 1110 W power supply HP Z820 Workstation 1125 W power supply HP Z840 Workstation 1125 W power supply

Power consumption and cooling
Introduction
If your power load is over 800 watts, and your power source is between 90 to 115 volts, the HP Z800
Workstation 1110 W power supply, the HP Z820 Workstation 1125 W power supply, or the HP Z840
Workstation 1125 W power supply are designed for your applications, and this site preparation guide
is important. The 1110 W power supply has an efficiency rating that qualifies it for 80 PLUS SILVER
status*. The 1125 W power supplies have an efficiency rating that qualifies it for 80 PLUS GOLD
status**.
For loads over 800 watts, observe the considerations and limitations presented in the following
sections.
* The 80 PLUS specification states that all SILVER power supplies are at least 85%/89%/85% efficient at 20%, 50% and
100% of rated output, respectively.
* The 80 PLUS specification states that all GOLD power supplies are at least 87%/90%/87% efficient at 115V at 20%, 50%
and 100% of rated output, respectively.
Power consumption and cooling considerations
An HP workstation with a 1110 W 80 PLUS SILVER or 1125 W 80 PLUS GOLD power supply might
require more power than the typical office environment can supply. Consider the following issues:
●
A fully loaded configuration might draw up to 15 amps of 110V power, leaving no power for other
accessories. A typical office has several 15 amp circuits.
●
An office air conditioning system must accommodate the extra heat generated by fully loaded
workstation configurations.
●
Some environments might have power conditioning problems that prevent the reliable use of
high-end workstation configurations.
●
If your workstation is powered from a 220V source and you meet HP configuration guidelines,
you do not need an uninterruptible power supply (UPS) for a maximum output of 1250 watts with
the HP Z800 Workstation 1110 W power supply or 1450 watts with the Z820 Workstation 1125
W power supply or 1450 watts with the Z840 Workstation 1125 W power supply.
Introduction 1