Accessory Board Slots; Agp Accessory Board Slot; Pci Accessory Board Slots - HP P Class 450/500/550/600/650/700/750 Reference Manual

Accessory Board Slots

The following block diagram of the accessory board slots is valid for both desktop and minitower
models. Refer to the section "Devices on the PCI Bus" in this chapter for the PCI mapping table.
1 AGP slot. Can be used for a graphics
controller.
3 PCI slots. Can be used for a 32-bit PCI
board.
1 Combination
either a full-length 32-bit PCI or a
full-length 16-bit ISA board.
1 ISA slot. Can be used for a full-length
16-bit ISA board.

AGP Accessory Board Slot

The Accelerated Graphics Port (AGP) bus, provides a high performance graphics interface.
It uses a 66 MHz base clock, and provides a peak bandwidth of 528 MB/second.
AGP supports several modes, which are listed below. In its basic mode, AGP is very much
like a 66 MHz PCI bus; in a more advanced mode, pipelining is added along with special
sideband signals, thereby improving the bus performance. A double-clocking mechanism
enables data transfers on both rising and falling edges of the clock, which brings the
maximum bandwidth to 528 MB/s: 66 MHz x 2 (double-clock) x 4 (bus width = 32 bit).
The different AGP modes include:
• Basic AGP: 66MHz, PCI-like. Bandwidth: 264 MB/s.
• Pipelined AGP: 66MHz + pipeline.
• Sideband AGP: 66MHz + pipeline + sideband signals.
• Full AGP: 133 MHz equivalent (66 MHz with double clocking) + pipeline + sideband
signals. Bandwidth: 528 MB/s.
For information about the AGP bus interface, refer to the section "AGP Bus Interface" in
this chapter.

PCI Accessory Board Slots

There is a total of four Peripheral Component Interconnect (PCI) slots on the system
board. The fourth PCI slot shares the corresponding AT slot (Combo), since the PCI board
or an AT board can be installed in it.
The system board and BIOS support the PCI specification 2.1. It fully supports PCI-to-PCI
bridges and multi-function PCI devices; and each of the four PCI slots has Master
Chapter 2
slot. Can be used for
System board edge
System Board
Accessory Board Slots
J57 (PCI Slot 1)
J58 (PCI Slot 2)
J59 (PCI Slot 3)
J60 (PCI Slot 4)
AT
AT
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