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2 System Board
Accessory Board Slots
50 W in the Minitower models. Power on the existing part of the connector
is delivered on 5.0 V and 3.3 V rails. Power on the extension is delivered on
the 12 V and 3.3 V rails.
Either standard AGP graphics cards or AGP Pro graphics cards < 50 Watts of
power can be used (below 25W a standard AGP connector may be used),
with power being provided through 3.3 V, 5 V, or 12 V power rails.
NOTE AGP Pro graphics cards drawing between 50W and 110W (“high-power” AGP
Pro cards
)
cannot be used in the slot
.
The AGP Pro Universal slot is backwards compatible with both AGP 1x and
2.x modes (using 3.3 V or 1.5 V signalling), and AGP 4x mode (where 1.5 V
signalling is required).
The AGP interface and bus are explained on page 44
.
AGP Pro Universal Slot (Desktop Models)
Desktop models of the HP Kayak XM600 Series 2 are equipped with a
single AGP (Accelerated Graphics Port) Pro Universal graphics slot.
The connector accepts only standard (
≤
25 W) AGP graphics cards. AGP
Pro cards (> 25 W) cannot be used — a hardware detection prevents the
PC Workstation from booting.
The AGP 4x graphics controller provides a high-performance graphics
interface. It uses a 66.6 MHz base clock, and provides a peak bandwidth of
1056 MB/second in AGP 4x mode.
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 1056 MB/s.
The AGP interface and bus are explained on page 44
.