HP Z800 Owners Manual

							7.Angle the card into the PCI card guide. Align the PCIe card keyway with the slot key, and then
firmly seat the card in the slot as shown in the following figure 
.
If required by the card, connect the auxiliary power cable to the card (not illustrated), or other cables
or accessories described in the card instructions. (See 
Removing the expansion card guide/front
fan holder on page 126 to find the storage location of the auxiliary power cables.)
Figure 5-96  Installing a PCIe card
8.Close the expansion card retention clamp by rotating it downward 2. The retention clamp is
secured by the expansion card support.
NOTE:It is normal for the expansion card retention clamp to have a slight (5-10 degree) angle
when closed. If the angle is greater than this, open the clamp and ensure that all cards are properly
seated and all the brackets are mated to the chassis, then re-close the clamp.
9.Install the expansion card support (see Installing the expansion card support on page 79).
10.Reinstall all removed components and reconnect any cables that have been disconnected.
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							PCI card
This section describes replacing a PCI card.
Removing a PCI card
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 all cables connected to the PCI card.
5.Raise the rear retention clamp by lifting the metal bar or the green lever as shown in the following
figure 
.
Figure 5-97  Removing a PCI card
6.Lift the PCI card out of the chassis 2.
TIP:Store the card in an antistatic bag.
7.Install a PCI slot cover and close the expansion card retention clamp. The retention clamp is
secured by the expansion card support.
NOTE:It is normal for the expansion card retention clamp to have a slight (5-10 degree) angle
when closed. If the angle is greater than this, open the clamp and ensure that all cards are properly
seated and all the brackets are mated to the chassis, then re-close the clamp.
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							Installing a PCI card
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.Raise the rear retention clamp by lifting the metal bar or the green lever as shown in the following
figure 
.
Figure 5-98  Removing the slot cover
5.Lift the slot cover straight up to remove it from the chassis 2.
TIP:Grasp the slot cover between two fingers—one from the inside of the chassis, and one from
the outside.
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							6.Align the PCI card keyway with the slot key, and then firmly seat the card in the slot as shown in
the following figure 
.
Figure 5-99  Installing a PCI card
7.Close the expansion card retention clamp by rotating it downward 2. The retention clamp is
secured by the expansion card support.
NOTE:It is normal for the expansion card retention clamp to have a slight (5-10 degree) angle
when closed. If the angle is greater than this, open the clamp and ensure that all cards are properly
seated and all the brackets are mated to the chassis, then re-close the clamp.
8.Install the expansion card support (see Installing the expansion card support on page 79).
9.Reinstall all removed components and reconnect any cables that have been disconnected.
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							CPU heatsink
This section describes how to remove and install a CPU heatsink.
Removing the CPU heatsink
1.Power down the workstation (see Predisassembly procedures on page 73).
2.Disconnect power from the workstation (see 
Predisassembly procedures on page 73).
3.Remove the side access panel (see 
Removing the side access panel on page 75).
4.Remove the memory fans (see 
Removing the memory fans on page 136).
5.Remove the airflow guide (see 
Removing the airflow guide on page 76).
6.Slowly and evenly loosen one pair of diagonally opposite screws 
 from the CPU until the screw
shanks disengage from the system board, and then loosen the remaining pair 
2 as shown in the
following figure.
CAUTION:Do not fully loosen one screw, and then move on to the next. Instead, loosen all
screws a little at a time, ensuring that the CPU remains level.
Figure 5-100  Loosening heatsink screws in sequence
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							7.Disconnect the CPU heatsink fan cable from the system board  as shown in the following figure.
Figure 5-101  Disconnecting the heatsink fan cable
8.Lift the CPU heatsink out of the chassis 2.
9.Use alcohol and a soft cloth to clean the thermal interface residue from the CPU and the heatsink,
allowing the alcohol on the CPU and CPU heatsink to dry completely.
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							Installing the CPU heatsink
1.Perform one of the following tasks:
●If you are reusing the original heatsink, apply thermal compound to the center of the CPU top
surface.
●If you are using a new CPU heatsink, do not apply thermal compound to the CPU because
the new heatsink already has thermal compound applied to the heatsink surface. Instead,
remove the thermal compound protective liner from the bottom of the new heatsink.
2.Align the four mounting screws with the mounting holes in the system board and carefully place
the heatsink on the CPU.
Ensure that the heatsink is placed properly with the fans positioned toward the front of the
workstation.
CAUTION:Do not overtighten the heatsink screws. If you overtighten them, you might strip the
threads in the system board tray.
Do not fully tighten one screw and then move on to the next. Instead, tighten all screws a little at
a time, ensuring that the CPU remains level.
3.Tighten all screws partially so the CPU heatsink remains level.
4.Tighten each set of diagonally opposed screws a little at a time to 6 inch-lbs. of torque as shown
in the following illustration.
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							5.Connect the CPU heatsink fan connector to the system board.
Figure 5-102  Connecting the heatsink fan cable
6.Reinstall all removed components and reconnect any cables that have been disconnected.
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							CPU
This section describes how to remove and install a CPU.
Removing a CPU
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.Remove the memory fan assembly (see 
Removing the memory fans on page 136).
6.Remove the CPU heatsink (see 
Removing the CPU heatsink on page 153).
7.Raise the CPU socket lever 
 and open the cover 2 as shown in the following figure.
Figure 5-103  Removing a CPU
CAUTION:The CPU socket contacts and pads are extremely fragile. Do not touch the CPU
socket contacts or the gold pads underneath the CPU. Use extreme care and handle the CPU only
by the edges.
8.Pull the CPU straight out of the socket , and store the CPU in a static free container in a safe
place where it cannot be damaged
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							Installing a CPU
NOTE:HP recommends that you do not swap processors (CPUs) from one system board to another.
If installing a second CPU, it must be of the same type as the first CPU.
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.Remove the memory fan assembly (see 
Removing the memory fans on page 136).
5.Remove the CPU heatsink (see 
Removing the CPU heatsink on page 153).
6.Remove the CPU (see 
Removing a CPU on page 157).
7.Using extreme care, fully raise the CPU socket lever and cover.
CAUTION:The CPU socket contacts are delicate. To avoid bending the contacts, use extreme
care when installing the CPU in the socket.
8.If you are adding a second CPU to a single-processor system, remove the plastic cover from the
second CPU socket.
9.Align the notches in the CPU base with the tabs on the socket as shown in the following figure.
Seat the CPU into the socket. Ensure that the underside of the CPU is level with the top of the CPU
socket.
10.Close the CPU cover plate by lightly pressing down on the CPU cover plate while closing the socket
lever.
11.Replace the CPU heatsink (see 
Installing the CPU heatsink on page 155 for installation details.)
12.Reinstall all removed components and reconnect any cables that have been disconnected.
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