Pci Express - HP xw4550 Service And Technical Reference Manual

3. Secure the bracket with two screws (3).
Figure 4-21

PCI Express

PCI Express improves system attributes. PCI Express enables a low-power, scalable, high-bandwidth
communication path with a small number of connections (wires) compared to traditional parallel
interfaces (for example, PCI). The PCI Express I/O slots can support other PCI Express cards with lesser
bus bandwidth than what is physically defined for the slot. Use the following table to determine
compatibility.
Table 4-5 PCI Express compatibility matrix for the HP xw4550 Workstation
PCI Express x16 slot
PCI Express x4(1)slot
To remove a PCI Express card:
1. Disconnect power from the system
access panel
on page
2. Lift the PCI levers (1) by first pressing down and then up.
3. If removing a PCI Express x16 graphics card, press in on the release lever (2) while lifting the card
(3) out of the chassis. Store the card in an anti-static bag.
If removing another type of PCI Express card, lift the card out of the chassis. You do not need to
press in on the release lever.
76 Chapter 4 Removal and replacement procedures
Installing the PCI retainer
Mechanical compatibility
x1, x4, x8 and x16 cards
x1 and x4 cards
(Side access panel on page
75), if installed.
Electrical compatibility
x1 , x4, x8, and x16 modes
x1 mode
(Predisassembly procedures on page
62), and remove the PCI retainer
57), remove the side
(PCI retainer
ENWW