HP Kayak XU800 Series, Техническое справочное руководство

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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.