Intel S5000XAL manual Memory Sub-system, CEK Processor Mounting

Intel® Server Board S5000PAL / S5000XAL TPS Functional Architecture

Heatsink assembly

Thermal interface material (TIM)

Server board

CEK spring

Chassis

Figure 10. CEK Processor Mounting

3.1.3Memory Sub-system

On the Intel® Server Board S5000PAL / S5000XAL, the MCH provides four channels of Fully Buffered DIMM (FB-DIMM) memory. Each channel can support up to 2 Dual Ranked FB-DIMM DDR2 DIMMs. FB- DIMM memory channels are organized in to two branches for support of RAID 1 (mirroring). The MCH can support up to 8 DIMMs or a maximum memory size of 32 GB physical memory in non-mirrored mode and 16 GB physical memory in a mirrored configuration. The read bandwidth for each FB-DIMM channel is 4.25 GB/s for DDR2 533 FB-DIMM memory which gives a total read bandwidth of 17 GB/s for four FB- DIMM channels. Thus, this provides 8.5 GB/s of write memory bandwidth for four FB-DIMM channels. The read bandwidth for each FB-DIMM channel is 5.3GB/s for DDR2 667 FB-DIMM memory which gives a total read bandwidth of 21GB/s for four FB-DIMM channels. Thus, this provides 10.7 GB/s of write memory bandwidth for four FB-DIMM channels. The total bandwidth is based on read bandwidth thus the total bandwidth is 17 GB/s for 533 and 21.0 GB/s for 667.

On the Intel® Server Board S5000PAL / S5000XAL, a pair of channels becomes a branch where Branch 0 consists of channels A and B, and Branch 1 consists of channels C and D. FBD memory channels are organized into two branches for support of RAID 1(mirroring).

Channel B Channel A

Channel C Channel D

MCH

Branch 0

Branch 1

A1
DIMM	A2
DIMM B1
DIMM		B2
	DIMM C1
	DIMM C2
		DIMM D1
		DIMM	D2
		DIMM

TP02299

Figure 11. Memory Layout

Revision 1.4	27
	Intel order number: D31979-007