Dell R220 Owner's Manual download pdf (Page 47)

channel 1: memory sockets 1 and 3

channel 2: memory sockets 2 and 4

The following table shows the memory populations and operating frequencies for the supported

configurations.

DIMM Type DIMMs Populated/

Channel

Operating Frequency (in

MT/s)

Maximum DIMM Rank/

Channel

1.35 V

UDIMM ECC 1 1333, 1600 Dual rank

2 1333, 1600 Dual rank

General Memory Module Installation Guidelines

NOTE: Memory configurations that fail to observe these guidelines can prevent your system from

booting, hanging during memory configuration, or operating with reduced memory.

This system supports Flexible Memory Configuration, enabling the system to be configured and run in

any valid chipset architectural configuration. The following are the recommended guidelines for best

performance:

• x4 and x8 DRAM based DIMMs can be mixed.

• Populate all sockets with white release tabs first, and then black.

• Populate the sockets by highest rank count in the following order – first in sockets with white release

levers, and then black. For example, if you want to mix quad-rank and dual-rank DIMMs, populate

quad-rank DIMMs in the sockets with white release tabs and dual-rank DIMMs in the sockets with

black release tabs.

• Memory modules of different sizes can be mixed provided that other memory population rules are

followed (for example, 4 GB and 8 GB memory modules can be mixed).

• If memory modules with different speeds are installed, they will operate at the speed of the slowest

installed memory module(s) or slower depending on system DIMM configuration.

Sample Memory Configurations

The following table shows sample memory configurations that follow the appropriate memory guidelines

stated in this section.

NOTE: Minimum supported memory is 4 GB and maximum supported memory is 32 GB.

NOTE: 1R and 2R in the following table indicates single- and dual-rank DIMMs respectively.

Table 1. Memory Configurations

System Capacity

(in GB)

DIMM Size (in

GB)

Number of

DIMMs

DIMM Rank, Organization,

and Frequency

DIMM Slot

Population

4 4 1 1R, x8, 1333 MT/s, 1

1R, x8, 1600 MT/s

8 4 2 1R, x8, 1333 MT/s, 1, 2

1R, x8, 1600 MT/s

16 4 4 2R, x4, 1333 MT/s, 1, 2, 3, 4

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 97 98

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Dell R220 Owner's Manual Page 47

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