HP Z800 Owners Manual

							Installing the expansion card guide/front fan holder
1.Ensure that the fan holder includes the desired cooling fans (see Installing a second front system
fan on page 132).
2.With power off to the workstation and the chassis open, place the expansion card guide/front fan
holder assembly in the chassis. Place the tabs at the bottom of the assembly into the slots in the
chassis as shown in the following figure 
.
NOTE:When positioning the expansion card guide/front fan holder into the chassis, make sure
there are no cables between the fans and the chassis mounting wall. All workstation cables should
be located under the card guide.
TIP:To engage the hooks, you might have to press down firmly on the card guide/fan holder to
overcome cable resistance.
3.Rotate the assembly up until it snaps into place 2
4.Connect the cooling fan power cables to the system board (see Installing a second front system
fan on page 132).
5.Reinstall all removed components and reconnect any cables that have been disconnected.
ENWW Removing and installing components 129 
						

							System fans
This section describes how to remove and install the front and rear system fans.
Removing the rear system fan assembly
1.Disconnect power from the workstation (see Predisassembly procedures on page 73).
2.Remove the side access panel (see 
Removing the side access panel on page 75).
3.Remove the expansion card support (see 
Removing the expansion card support on page 77).
4.Remove the airflow guide (see 
Removing the airflow guide on page 76).
5.Disconnect the rear system fan assembly cable connector from the system board as shown in the
following figure.
NOTE:There is a single cable connector for the dual fan assembly.
Figure 5-75  Removing the rear system fans
130 Chapter 5   Replacing components ENWW 
						

							6.Use a Torx T-15 driver to remove the four rear system fan assembly Torx screws , and then remove
the assembly from the rear of the chassis.
Figure 5-76  Removing the rear system fans
Installing the rear system fan assembly
1.With the power off and the chassis open for access, place the rear system fan assembly in the
chassis. Use a Torx T15 driver to secure the rear fan assembly in the chassis with four screws as
shown in the following figure.
Figure 5-77  Installing the rear system fan assembly
ENWW Removing and installing components 131 
						

							2.Connect the rear system fan assembly cable to the system board as shown in the following figure.
Figure 5-78  Connecting the rear system fan assembly cable
3.Reassemble the workstation, and then replace the side access panel.
Installing a second front system fan
1.Remove the expansion card guide/front fan holder (see Removing the expansion card guide/front
fan holder on page 126).
2.Orient the front system fan so that the fan label points into the expansion card guide/front fan holder.
Figure 5-79  Orienting the fan in the fan holder
132 Chapter 5   Replacing components ENWW 
						

							3.Insert the fan cable under the fan holder hooks  as shown in the following figure.
Rotate the fan near the retention tab and press it until it snaps into place 
2 in the fan holder.
Figure 5-80  Inserting the fan in the holder
4.Guide the fan cable under the cable retention clamps as shown in the following figure.
Figure 5-81  Routing the fan cable
5.Install the expansion card guide/front fan holder in the chassis (see Installing the expansion card
guide/front fan holder on page 129).
ENWW Removing and installing components 133 
						

							6.Replace the graphics auxiliary power cables in the retention hook as shown in the following figure.
Figure 5-82  Replacing the graphics auxiliary power cables in the retention hook
7.Clip the graphics auxiliary power connectors into the expansion card guide storage receptacles as
shown in the following figure.
Figure 5-83  Replacing the graphics auxiliary power cables in the storage pocket
134 Chapter 5   Replacing components ENWW 
						

							8.Connect the front system fan cable(s) to the system board as shown in the following figure. If there
is only one fan, connect its cable to the inner-most connector.
Figure 5-84  Connecting the fan cable
9.Reinstall all removed components and reconnect any cables that have been disconnected.
ENWW Removing and installing components 135 
						

							Memory fans
This section describes how to remove and install the memory fans.
Removing the memory fans
1.Disconnect power from the workstation (see Predisassembly procedures on page 73).
2.Remove the side access panel (see 
Removing the side access panel on page 75).
3.Remove the airflow guide (see 
Removing the airflow guide on page 76).
4.Grasp the sides of the memory fan assembly 
 and press the memory fan assembly release tabs
2 with your index fingers as shown in the following figure.
Figure 5-85  Releasing the memory fan assembly
5.Lift the memory fan assembly upward, out of the chassis as shown in the following figure.
Figure 5-86  Removing the memory fan assembly
136 Chapter 5   Replacing components ENWW 
						

							Installing the memory fans
1.With workstation power off and the chassis open, place the memory fan assembly tabs in the
chassis slots 
 as shown in the following figure.
Figure 5-87  Installing the memory fan assembly
2.Press the release tabs at the green touch points with the index fingers, while grasping the side of
the fan assembly with the remaining fingers. Carefully lower the fan assembly into the chassis until
it clicks into place 
2.
ENWW Removing and installing components 137 
						

							Memory
This section presents dual inline memory module (DIMM) configuration information and removal/
installation procedures.
DIMM installation guidelines
Install only HP-approved ECC unbuffered DDR3 DIMMs. See http://www.hp.com/go/quickspecs to find
which DIMMs are compatible with the workstation.
CAUTION:HP only ships DIMMs that are electrically and thermally compatible with this workstation.
Because third-party DIMMs might not be electrically or thermally compatible, they are not supported by
HP.
Supported DIMM configurations
This workstation supports these DIMM configurations:
●Twelve DIMM slots
●Both Unbuffered ECC and Registered DIMMs
●Memory configuration from 1 GB to 192GB*
●Total DIMM count:
Independent channels
per processorSingle processorDual processor
SingleTwoFour
DualFourEight
ThreeSix Twelve
●In dual processor configurations, the workstation can be configured for NUMA** or non-NUMA
modes
●No support for mirroring
●No support for DIMM sparing
NOTE:Do not intermix unbuffered ECC with registered DIMMs.
For maximum performance, install the same number of DIMMs per CPU. Install them in pairs of the
same size if your workstation has two CPUs.
* The 1110W power supply is required for a 96 GB or greater configuration.
** NUMA mode provides contiguous address space for each CPU such that a CPU can access its own
local memory faster than it can access memory local to another processor, or to memory shared between
processors.
138 Chapter 5   Replacing components ENWW