HP ET115AV HP xw4400 Workstation - Service and Technical Reference Guide - Page 19

System fans, Resetting the power supply, 80Plus power supply

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Table 1-10 Example 2 heat dissipation** 115 VAC 230 VAC 100 VAC LAN Enabled LAN Disabled LAN Enabled LAN Disabled LAN Enabled LAN Disabled Windows Idle (S0) 468 BTU/hr. 457 BTU/hr. 481 BTU/hr. Windows Busy Typ (S0) 669 BTU/hr. 652 BTU/hr. 676 BTU/hr. Windows Busy Max (S0) 877 BTU/hr. 863 BTU/hr. 915 BTU/hr. Sleep (S3)* 11.9 BTU/hr. 9.56 BTU/hr. 13.9 BTU/hr. 11.6 BTU/hr. 11.9 BTU/hr. 9.22 BTU/hr. Power off (S5) 6.48 BTU/hr. 4.09 BTU/hr. 9.89 BTU/hr. 6.14 BTU/hr. 6.48 BTU/hr. 4.09 BTU/hr. * Energy Star low energy mode. ** Heat dissipation is calculated based on the measured watts, assuming the service level is attained for one hour. This product is in compliance with US executive order 13221, WOL (wake on LAN) disabled. NOTE: When you power down your workstation with the power button on the front panel, the power consumption falls below 10 W. To reach zero power consumption, unplug the workstation from the power outlet or use a power strip with a switch. For additional information on power-saving features, see your operating system documentation. System fans The workstation includes a rear system fan, one memory fan, one CPU heatsink fan, one power supply fan, plus an optional front system fan is available for special considerations. Resetting the power supply If an overload triggers the power supply overload protection, all power is immediately disconnected. To reset the power supply unit: 1. Disconnect the power cord. 2. Determine what caused the overload and fix the problem. 3. Reconnect the power cord and reboot the workstation. When you power down the workstation through the operating system, power consumption falls below the low power consumption but does not reach zero. This on/off feature extends the life of the power supply. 80Plus power supply This section describes the 475 watt, 80Plus energy efficient power supply. Table 1-11 Power supply source voltages Source voltage Description +3.3 V PCI, PCI Express, audio, CK-410, ICH7R, super I/O, BIOS ROM, and onboard logic +5.1 V Storage (disk, optical, diskette), PCI, PCI Express, ICH7R, audio, keyboard/ mouse 12 V-B PCI, PCI Express, and system fans ENWW Product specifications 9

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Table 1-10
Example 2 heat dissipation**
115 VAC
230 VAC
100 VAC
LAN
Enabled
LAN
Disabled
LAN
Enabled
LAN
Disabled
LAN
Enabled
LAN
Disabled
Windows Idle (S0)
468 BTU/hr.
457 BTU/hr.
481 BTU/hr.
Windows Busy Typ (S0)
669 BTU/hr.
652 BTU/hr.
676 BTU/hr.
Windows Busy Max (S0)
877 BTU/hr.
863 BTU/hr.
915 BTU/hr.
Sleep (S3)*
11.9 BTU/hr.
9.56 BTU/hr.
13.9 BTU/hr.
11.6 BTU/hr.
11.9 BTU/hr.
9.22 BTU/hr.
Power off (S5)
6.48 BTU/hr.
4.09 BTU/hr.
9.89 BTU/hr.
6.14 BTU/hr.
6.48 BTU/hr.
4.09 BTU/hr.
* Energy Star low energy mode.
** Heat dissipation is calculated based on the measured watts, assuming the service level is attained for one hour.
This product is in compliance with US executive order 13221, WOL (wake on LAN) disabled.
NOTE:
When you power down your workstation with the power button on the front panel, the power
consumption falls below 10 W. To reach zero power consumption, unplug the workstation from the power
outlet or use a power strip with a switch. For additional information on power-saving features, see your
operating system documentation.
System fans
The workstation includes a rear system fan, one memory fan, one CPU heatsink fan, one power supply
fan, plus an optional front system fan is available for special considerations.
Resetting the power supply
If an overload triggers the power supply overload protection, all power is immediately disconnected. To
reset the power supply unit:
1.
Disconnect the power cord.
2.
Determine what caused the overload and fix the problem.
3.
Reconnect the power cord and reboot the workstation.
When you power down the workstation through the operating system, power consumption falls below
the low power consumption but does not reach zero. This on/off feature extends the life of the power
supply.
80Plus power supply
This section describes the 475 watt, 80Plus energy efficient power supply.
Table 1-11
Power supply source voltages
Source voltage
Description
+3.3 V
PCI, PCI Express, audio, CK-410, ICH7R, super I/O, BIOS ROM, and on-
board logic
+5.1 V
Storage (disk, optical, diskette), PCI, PCI Express, ICH7R, audio, keyboard/
mouse
12 V–B
PCI, PCI Express, and system fans
ENWW
Product specifications
9