HP Z640 Workstation Series Service Manual

Changing the power button configuration (Windows only)
CAUTION: To reduce the risk of data loss, do not use the power button to turn off the computer unless the
system is unresponsive.
NOTE: If the computer is unresponsive, press and hold the power button for four seconds to completely
turn off power to the computer.
Windows 7
1. Select Start, and then select Control Panel > System and Security > Power Options.
2. In the left pane, click Choose what the power buttons do.
3. Select the desired options.
If you choose Sleep or Hibernate, you can press the power button to initiate standby, and then press it again
to exit standby and return to your work. To completely turn off the workstation, select Start > Shut Down.
Windows 8
1. Point to the upper-right or lower-right corner of the Start screen to display the charms.
2. Select Search.
3. In the Search field, type control.
4. Select Control Panel, and then select System and Security > Power Options.
5. Select Choose What the Power Button Does.
6. Select the desired options.
44 Chapter 2 System management

HP Z640 Workstation Series Specifications

General

Chipset	Intel C612
Memory Slots	8 DIMM slots
Form Factor	Tower
Processor Options	Intel Xeon E5-2600 v3/v4
Storage Options	SATA, SAS, SSD
Storage Controllers	Integrated SATA 6.0 Gb/s controller
Graphics Options	NVIDIA Quadro, AMD FirePro
Expansion Slots	1 PCIe Gen3 x8; 1 PCIe Gen3 x4; 1 PCI
Audio	Integrated Realtek HD ALC221
Networking	Integrated Intel I218LM PCIe GbE
Operating Systems	Windows 10