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Installing and Upgrading DDR3 Memory:
Quick Reference Guide for New Dell PowerEdge Servers
August 19, 2009 Thomas Cloyd – Dell, Inc. | Server Product Group
Introduction
This paper provides memory guidance at time of system purchase for later memory upgrades for Dell 11
th
Generation – 610 and 710 Series – PowerEdge Servers. The purpose is to understand what Dell will support,
simplify terminology, and describe rules when installing memory with examples of upgrade paths.
Quick Reference Guide
Table 1 is intended for quick reference in order to understand what Dell will support and the rules governing
memory configurations.
Table 1: Quick Reference Memory Guide
DIMM Feature Combine Rules
Mixed Type
(RDIMM / UDIMM)
No Not Supported
Mixed Ranks
Yes
Single (SR) and Dual Rank (DR) DIMMs can be mixed. If mixing SR or DR with
Quad Rank (QR) DIMMs, the first slot of each channel populated (first two
white tab DIMM slots on each processor: A1, A2, B1 & B2) must be
populated with the QR DIMM. Only two QR DIMMs are permitted per
channel because the maximum of total ranks per channel is 8.
Mixed Capacity
Yes
All populated channels must have the same DIMM arrangement. Example
with Channel 1: if bank A is populated with a 4GB DIMM (slot A1), bank B
with 2GB (slot A4) and Bank C is empty (slot A7), all memory Channels must
be populated that way. (see figure 5)
Mixed Speeds
Yes
If memory modules (DIMMS) with different speeds are installed, all DIMMs
will operate at the speed of the slowest installed DIMM.
Also, if any DIMMS (regardless of speed) are installed in the third bank
(bank C: slots A/B 7, 8 or 9), the maximum system memory speed will be
800MHz. This is the current maximum frequency supported by Intel and
Dell, when DIMMS are installed in slots 7, 8 & 9.
Mixed Vendors
Yes
Any Dell sourced DDR3 DIMMs are supported, regardless of vendor or
vendor mix. Where possible, Dell recommends using the same DIMM
manufacturer.
Identifying the correct DIMM slots in 610 and 710 Series servers
(M/R/T610 and M/R/T710 servers)
Pre-existing DIMM positions may not be correct for upgrading. When upgrading memory modules, you
must follow these population guidelines. Incorrect population will result in BIOS warnings or errors.
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