IBM x3755 Installation Guide - Page 23

Installing a memory module, User's Guide, System x Documentation - memory configuration

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Installing a memory module The following illustration shows how to install a dual inline memory module (DIMM) on a microprocessor/memory card. The following notes describe information that you must consider when you install DIMMs: v You can configure your server to use online-spare memory, Chipkill memory, and memory scrubbing. For detailed information about configuring your server and using these features, see the User's Guide on the IBM System x Documentation CD. v The server supports up to four microprocessor/memory cards. Each microprocessor/memory card holds up to eight DIMMs. v When you install additional DIMMs on a microprocessor/memory card, be sure to install them in pairs. Each pair of DIMMs must be the same speed, type, and size. However, each microprocessor/memory card can have different speed, type, and size DIMMs. v See Table 2 for the order in which to install DIMMs on each microprocessor/memory card. Table 2. DIMM pair installation sequence Installation order First pair DIMM connectors 1 and 2 Second pair 3 and 4 Third pair Fourth pair 5 and 6 7 and 8 The following illustration shows the DIMM connectors on the microprocessor/memory card. Chapter 2. Installing options 11

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Installing a memory module
The following illustration shows how to install a dual inline memory module (DIMM)
on a microprocessor/memory card.
The following notes describe information that you must consider when you install
DIMMs:
v
You can configure your server to use online-spare memory, Chipkill memory, and
memory scrubbing. For detailed information about configuring your server and
using these features, see the
User’s Guide
on the IBM
System x Documentation
CD.
v
The server supports up to four microprocessor/memory cards. Each
microprocessor/memory card holds up to eight DIMMs.
v
When you install additional DIMMs on a microprocessor/memory card, be sure to
install them in pairs. Each pair of DIMMs must be the same speed, type, and
size. However, each microprocessor/memory card can have different speed, type,
and size DIMMs.
v
See Table 2 for the order in which to install DIMMs on each
microprocessor/memory card.
Table 2. DIMM pair installation sequence
Installation order
DIMM connectors
First pair
1 and 2
Second pair
3 and 4
Third pair
5 and 6
Fourth pair
7 and 8
The following illustration shows the DIMM connectors on the
microprocessor/memory card.
Chapter 2. Installing options
11