Intel S5000XAL manual 1.5 PE4, PE5 Two x4 PCI Express* Bus Segments, PCI Riser Slots

Intel® Server Board S5000PAL / S5000XAL TPS Functional Architecture

3.2.1.5PE4, 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).

3.2.1.6PE6, 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).

3.2.1.7PCI 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
1U	– 1 add-in card slot	x8 or x4
2U	– 2 add-in card slots	x4

2add-in cards populated

NA 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*	1 add-in card populated	2 add-in cards populated	3 add-in cards populated
(Passive) Riser
1U – 1 add-in card slot	Up to 133MHz	NA	NA
2U – 3 add-in card slots	Up to 100MHz in top PCI	Up to 100MHz using top	66MHz
	slot	and middle slots

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*	1 add-in card populated	2 add-in cards populated	3 add-in cards populated
(Active) Riser
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.

Revision 1.4	35
	Intel order number: D31979-007