Hp ProLiant BL465c G7 Server-Blade User Manual download pdf (Page 21)

Hardware options installation 21

Hardware options installation

Introduction

If more than one option is being installed, read the installation instructions for all the hardware options

and identify similar steps to streamline the installation process.

WARNING: To reduce the risk of personal injury from hot surfaces, allow the drives and the

internal system components to cool before touching them.

CAUTION: To prevent damage to electrical components, properly ground the server before

beginning any installation procedure. Improper grounding can cause electrostatic discharge.

Memory option

To expand server memory, install DDR3 RDIMMs or UDIMMs. Single-rank, dual-rank, and quad-rank

DIMMs are supported. Up to 256 GB of memory is possible using sixteen 16-GB DIMMs (eight DIMMs

per processor).

The server blade supports the following DIMM speeds:

• Single- and dual-rank PC3-10600 (DDR-1333) DIMMs operating at 1333 or 1066 MHz

• Quad-rank PC3-8500 (DDR-1067) DIMMs operating at 1066 MHz

Depending on the number of DIMMs installed, the memory clock speed may be reduced to 1066 MHz.

The Advanced Memory Protection option in RBSU enables additional memory protection modes beyond

Advanced ECC. By default, the server is set to Advanced ECC Support. For more information, see "HP

ROM-Based Setup Utility (on page 50)" in this guide.

For DIMM slot locations, see "DIMM slot identification (on page 9)."

Single-, dual-, and quad-rank DIMMs

To understand and configure memory protection modes properly, an understanding of single-, dual-, and

quad-rank DIMMs is helpful. Some DIMM configuration requirements are based on these classifications.

A single-rank DIMM has one set of memory chips that is accessed while writing to or reading from the

memory. A dual-rank DIMM is similar to having two single-rank DIMMs on the same module, with only

one rank accessible at a time. A quad-rank DIMM is, effectively, two dual-rank DIMMs on the same

module. Only one rank is accessible at a time. The server blade memory control subsystem selects the

proper rank within the DIMM when writing to or reading from the DIMM.

Dual- and quad-rank DIMMs provide the greatest capacity with the existing memory technology. For

example, if current DRAM technology supports 2-GB single-rank DIMMs, a dual-rank DIMM would be 4-

GB, and a quad-rank DIMM would be 8-GB.

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Hp ProLiant BL465c G7 Server-Blade User Manual Page 21