IBM System x3850 X5 Implementation Guide

76 IBM eX5 Implementation Guide
3.8 Memory
Memory is installed in the x3850 X5 in memory cards. Up to eight memory cards can be
installed in the server, and each card holds eight DIMMs. Therefore, the x3850 X5 supports
up to 64 DIMMs.
This section includes the following topics:
򐂰 3.8.1, “Memory cards and DIMMs” on page 76
򐂰 3.8.2, “DIMM population sequence” on page 79
򐂰 3.8.3, “Maximizing memory performance” on page 84
򐂰 3.8.4, “Memory mirroring” on page 87
򐂰 3.8.5, “Memory sparing” on page 89
򐂰 3.8.6, “Effect on performance by using mirroring or sparing” on page 89
3.8.1 Memory cards and DIMMs
This section describes the available memory options for the x3850 X5 and the MAX5.
Memory cards for the x3850 X5
The x3850 X5, like its predecessor the x3850 M2, uses memory cards to which the memory
DIMMs are attached, as shown in Figure 3-16.
Figure 3-16 x3850 x5 memory card
Two scalable
memory buffers
DIMM 8
DIMM 1

IBM System x3850 X5 Specifications

General

Processor Cores	Up to 10 cores per processor
Chipset	Intel 7500
Hard Drive Interface	SAS/SATA
Processor	Intel Xeon E7-4800 series, Intel Xeon E7-8800 series
Memory Slots	64 DIMM slots
Storage	Up to 16 x 2.5" hot-swap SAS/SATA HDDs or SSDs
RAID Support	RAID 0, 1, 5, 6, 10
Network Interface	Integrated Gigabit Ethernet
Operating System Support	Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware vSphere
Form Factor	4U Rack