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Intel
®
Server Board S5000PAL / S5000XAL TPS Functional Architecture
Revision 1.4
Intel order number: D31979-007
35
3.2.1.5 PE4, PE5: Two x4 PCI Express* Bus Segments
Two x4 PCI Express* bus segments are directed through the MCH. These PCI Express segments, PE4
and PE5, support one x8 or two x4 PCI Express segments to the low profile riser slot (J5B1).
3.2.1.6 PE6, PE7: Two x4 PCI Express* Bus Segments
Two x4 PCI Express* bus segments are directed through the MCH. These PCI Express segments, PE6
and PE7, support one x8 or two x4 PCI Express segments to the full height riser slot (J4F1).
3.2.1.7 PCI Riser Slots
The server board has two riser slots capable of supporting riser cards for both 1U and 2U system
configurations. Because of board placement resulting in different pin orientations, and expanded
technology support associated with the full-height riser, the riser slots are not the same and require
different riser cards.
The low profile riser slot (J5B1) utilizes a 98-pin connector. It is capable of supporting one x8 (1U) or two
x4 (2U) low profile PCI Express* add-in cards. The x8 PCI Express* bus can support bus speeds of up to
20 Gb/S. The following table provides the supported bus throughput for the given riser card used and the
number of add-in cards installed.
Low Profile Riser 1 add-in card populated 2 add-in cards populated
1U – 1 add-in card slot x8 or x4 NA
2U – 2 add-in card slots x4 x4
Note: There are no population rules for installing a single low profile add-in card in the 2U LP riser card; a
single add in card can be installed in either PCI Express* slot. While each slot can accommodate a x8
card, each slot will only support x4 bus speeds.
The full height riser slot (J4F1) implements Intel
®
Adaptive Slot Technology. This 280-pin connector is
capable of supporting riser cards that meet either the PCI-X* or PCI Express* technology specifications.
The following tables show the maximum bus speed supported with different add-in card populations for
each supported riser card.
Full Height PCI-X*
(Passive) Riser
1 add-in card populated 2 add-in cards populated 3 add-in cards populated
1U – 1 add-in card slot Up to 133MHz NA NA
2U – 3 add-in card slots Up to 100MHz in top PCI
slot
Up to 100MHz using top
and middle slots
66MHz
Note: For the 2U PCI-X* (passive) riser card, add-in cards should be installed starting with the top slot
first, followed by the middle, and then the bottom. Any add-in card populated in the bottom PCI slot will
cause the bus to operate at 66MHz.
Full Height PCI-X*
(Active) Riser
1 add-in card populated 2 add-in cards populated 3 add-in cards populated
2U – 3 add-in card slots Up to 133MHz Up to 133MHz Up to 133MHz
Note: Each PCI slot on the 2U PCI-X* (active) riser card operates on an independent PCI bus. Therefore,
using an add-in card that operates below 133MHz will not affect the bus speed of the other PCI slots.