Memory subsystem, Memory slots – Dell Precision T7500 (Early 2009) User Manual

Page 17

Dual Processor Memory Configurations

Size

(GB)

DIMM

Ranks

DIMM1

DIMM2

DIMM3

DIMM4

DIMM5

DIMM6

Riser

DIMM1

Riser

DIMM2

Riser

DIMM3

Riser

DIMM4

Riser

DIMM5

Riser

DIMM6

1 GB

2 GB

1 GB

2 GB

1 GB

2 GB

4 GB

2 GB

8 GB

4 GB

8 GB

128

16 GB

8 GB

16 GB

8 GB

192

(RHEL

ONLY)

16 GB

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.