Dual Processor Memory Configurations

 

 

 

 

Size

DIMM

MB

MB

MB

MB

MB

MB

Riser

Riser

Riser

Riser

Riser

Riser

(GB)

Ranks

DIMM1

DIMM2

DIMM3

DIMM4

DIMM5

DIMM6

DIMM1

DIMM2

DIMM3

DIMM4

DIMM5

DIMM6

3

SR

1 GB

1 GB

 

 

 

 

1 GB

 

 

 

 

 

4

SR

1 GB

1 GB

 

 

 

 

1 GB

1 GB

 

 

 

 

6

SR

1 GB

1 GB

1 GB

 

 

 

1 GB

1 GB

1 GB

 

 

 

8

MR

2 GB

1 GB

1 GB

 

 

 

2 GB

1 GB

1 GB

 

 

 

12

SR

2 GB

2 GB

2 GB

 

 

 

2 GB

2 GB

2 GB

 

 

 

24

DR

4 GB

4 GB

4 GB

 

 

 

4 GB

4 GB

4 GB

 

 

 

24

SR

2 GB

2 GB

2 GB

2 GB

2 GB

2 GB

2 GB

2 GB

2 GB

2 GB

2 GB

2 GB

48

DR

8 GB

8 GB

8 GB

 

 

 

8 GB

8 GB

8 GB

 

 

 

48

DR

4 GB

4 GB

4 GB

4 GB

4 GB

4 GB

4 GB

4 GB

4 GB

4 GB

4 GB

4 GB

96

DR

8 GB

8 GB

8 GB

8 GB

8 GB

8 GB

8 GB

8 GB

8 GB

8 GB

8 GB

8 GB

128

MR

16 GB

16 GB

8 GB

8 GB

8 GB

8 GB

16 GB

16 GB

8 GB

8 GB

8 GB

8 GB

 

QR

 

 

 

 

 

 

 

 

 

 

 

 

192

(RHEL

16 GB

16 GB

16 GB

16 GB

16 GB

16 GB

16 GB

16 GB

16 GB

16 GB

16 GB

16 GB

 

ONLY)

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: If more than one Quad rank DIMM is installed within a channel (DIMM1 & DIMM4, DIMM2 & DIMM5, DIMM3 & DIMM6) then the maximum DDR3 speed is reduced to 800 MHz. Spreading Quad Rank memory modules accross multiple channels is recommended.

NOTE: DDR3 DIMMs have 240 pins, the same number as DDR2, and are the same size, but are electrically incompatible and have a different key notch location.

Memory Subsystem

The memory subsystem consists of three DDR3 memory channels attached to each processor. All single-processor configurations have six DIMM slots (two per channel) attached to the primary processor located on the system board. Dual-processor configurations require an optional riser card that contains the secondary processor and the DIMMs associated with the secondary processor. There are six DIMM slots on the riser, for a total of twelve DIMMs in the system.

DIMM slot configuration for a single processor or a second processor on the riser.

Memory Slots

There are six memory slots on the system board. The slots are numbered DIMM1 through DIMM6. DIMM1 is furthest from the processor.

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Dell T7500 service manual Memory Subsystem