HP Z8 G4 Maintenance And Service Guide

Poor performance.
Cause Solution
Hard drive fragmented. Defragment hard drive.
Program previously accessed did not release reserved memory
back to the system.
Restart the computer.
Virus resident on the hard drive. Run virus protection program.
Too many applications running. 1. Close unnecessary applications to free up memory.
2. Add more memory.
3. Some applications run in the background and can be closed by
right-clicking on their corresponding icons in the task tray. To
prevent these applications from launching at startup:
a. Type msconfig in the taskbar search box, and then
select mscong.
b. On the Startup tab of the System Conguration Utility,
click Open Task Manager.
c. Select applications that you do not want to launch
automatically, and the click Disable.
Some software applications, especially games, are stressful on
the graphics subsystem.
1. Lower the display resolution for the current application or
consult the documentation that came with the application for
suggestions on how to improve performance by adjusting
parameters in the application.
2. Add more memory.
3. Upgrade the graphics solution.
Cause unknown. Restart the computer.
Computer powered o automatically and the Power LED ashes red four times and then white two times.
Cause Solution
Processor thermal protection activated:
A fan may be blocked or not turning.
OR
The heat sink is not properly attached to the processor.
1. Ensure that the computer air vents are not blocked and
the processor cooling fan is running.
2. Open the access panel, press the power button, and see if
the processor fan (or other rear fan) spins. If the fan does not
spin, make sure the fan cable is plugged onto the system
board header.
3. If a fan is connected and not operating, replace it.
System does not power on and the LEDs on the front of the computer are not ashing.
Cause Solution
System unable to power on. Press and hold the power button for less than 4 seconds. If the hard
drive LED turns white, then:
Press and hold the power button for less than 4 seconds. If the hard
drive LED does not turn on white then:
1. Check that the unit is plugged into a working AC outlet.
52 Chapter 6 Troubleshooting without diagnostics

HP Z8 G4 Specifications

General

Display included	No
Keyboard included	Yes
Power supply	1125 W
Operating system architecture	64-bit
Audio chip	Realtek ALC221
Product type	Workstation
Market positioning	Business
Motherboard chipset	Intel C622
Chassis type	Tower
Product color	Black
Country of origin	China
Number of 3.5\" bays	4
Number of 5.25\" bays	2
PCI Express x8 slots	3
Headphone outputs	1
HDMI ports quantity	0
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	8
Cabling technology	10/100/1000Base-T(X)
Ethernet LAN data rates	10, 100, 1000 Mbit/s
HDD speed	7200 RPM
HDD interface	SATA
Storage media	HDD
Optical drive type	DVD Super Multi
Card reader integrated	-
Total storage capacity	1000 GB
Memory slots	24x DIMM
Internal memory	8 GB
Memory channels	Hepta-channel
Memory clock speed	2666 MHz
Internal memory type	DDR4-SDRAM
Maximum internal memory	- GB
Memory layout (slots x size)	1 x 8 GB
Tcase	77 °C
Stepping	U0
Processor cache	11 MB
Processor model	4108
System bus rate	- GT/s
Processor socket	LGA 3647 (Socket P)
Processor threads	16
Processor codename	Skylake
Processor frequency	1.8 GHz
Processor cache type	L3
Processor lithography	14 nm
Processor manufacturer	Intel
PCI Express slots version	3.0
Processor boost frequency	3 GHz
Thermal Design Power (TDP)	85 W
Maximum number of PCI Express lanes	48
Memory clock speeds supported by processor	2400 MHz
Maximum internal memory supported by processor	768 GB
Scalability	2S
Processor code	SR3GJ
Processor ARK ID	123544
Intel TSX-NI version	1.00
Processor package size	76.0 x 56.5 mm
Supported instruction sets	AVX, AVX 2.0, AVX-512, SSE4.2

Weight and Dimensions

Depth	551.2 mm
Width	215.9 mm
Height	444.5 mm
Weight	22400 g