HP Z840 power supply specifications
850W 88% Efficient, Custom PSU
(Wide-Ranging, Active PFC)
1125W/1275W*/1450W* 90%
Efficient, Custom PSU (Wide-Ranging,
Active PFC)
Operating voltage range 90–269 VAC 90–269 VAC
Rated voltage range
100–127 VAC
200–240 VAC
118 VAC 100 VAC
115–127 VAC
200–240 VAC
118 VAC
Rated line frequency 50–60 Hz 400 Hz 50–60 Hz 400 Hz
Operating line frequency range 47–66 Hz 393–407 Hz 47–66 Hz 393–407 Hz
Rated input current
11.5 @ 100–127V
5.5a @ 200–240V
11A @ 118
VAC
12A @ 100 VAC
12A @ 115–127 VAC
10A @ 200–240 VAC
12A @ 118
VAC
Heat dissipation (configuration and software
dependent)
Typical: 2142 btu/hr (540 kg cal/hr)
Max: 3335 btu/hr (840 kg cal/hr)
Typical: 2773 btu/hr (699 kg cal/hr)
Max 1: 3878 btu/hr (977 kg cal/hr)
Max 2: 5002 btu/hr (1260 kg cal/hr)
Max 3: 5624 btu/hr (1417 kg cal/hr)
Power supply fan (All fans are variable speed) (2) 80x25mm (2) 80x25mm
ENERGY STAR Qualified (Configuration dependent) Yes Yes
Power supply efficiency 88% efficient 90% efficient
FEMP Standby Power Compliant @115V (<1W in S5
– Power Off)
Yes Yes
ErP Compliant @ 230V (<0.5 W in S5 – Power Off) Yes Yes
CECP Compliant @ 220V (<4W in S3 – Suspend to
RAM)
Yes; Configuration dependent Yes; Configuration dependent
Power consumption in sleep mode (as defined by
ENERGY STAR)
<23 W <30 W
Built-in Self Test LED Yes Yes
Surge Tolerant Full Ranging Power Supply
(withstands power surges up to 2000V)
Yes Yes
*The 1125 W power supply can also supply 1275W of output power when the input voltage is greater than
105V. If the input voltage is less than 105V, the maximum power that can be drawn is 900W. An
uninterruptible power supply (UPS) is highly recommended if 1275W output power is desired. The 1125W
Power Supply can also supply 1450W of output power when the input voltage is greater than 180V under all
conditions.
Component replacement guidelines 71
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