HP KAYAK XU800 PCI Slots, • Two 64-bit66 MHz PCI slots: 3 and, •No accessory board in the PCI slot, •7 W maximum PCI board in the PCI slot

2 System Board

Accessory Card Slots

AGP 4x mode transfers data at twice the speed of AGP 2x mode, which is itself twice the speed of the basic AGP 1x mode. This is achieved by multiplying the 66 MHz AGP clock frequency, so that four packets of data are transferred on each cycle (transfers on both rising and falling edges of the clock speed). Each packet of data contains four bytes, giving a transfer rate of 66.6 MHz x 4 (quad-clock mechanism) x 4 bytes, a maximum bandwidth of 1064 MB/s.

The AGP interface and bus are explained on page 38.

PCI Slots

There is a total of five Peripheral Component Interconnect (PCI) connectors on the system board:

• Three 32-bit 33 MHz PCI slots: 1, 2 and 5.

• Two 64-bit 66 MHz PCI slots: 3 and 4.

The three 32-bit/33 MHz PCI slots accept 5 V PCI cards and Universal PCI cards (support for 3.3 V or 5 V), while the two

64-bit/66 MHz PCI slots support 3.3 V PCI cards and Universal PCI cards (support for 3.3 V or 5 V).

A universal compatible 32-bit 33 MHz accessory card can also be installed in PCI slots 3 or 4. However in this case the PCI 64-bit bus will only perform at 33 MHz.

The maximum supported power consumption per slot is 25W, from the 5V and/or the 3.3V supply, and must respect the electrical specifications of the PCI 2.2 specification. The power consumption of each PCI board is automatically reported to the system through the two Presence Detect pins of each PCI slot. These pins code the following cases:

•No accessory board in the PCI slot.

•7 W maximum PCI board in the PCI slot.

•15 W maximum PCI board in the PCI slot.

•25 W maximum PCI board in the PCI slot.

If a standard AGP (Accelerated Graphics Port) card is installed in the AGP Pro slot, the maximum power consumption for the PCI accessory and AGP slot must not exceed 100 W.

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