Dell M610 manual NHM-EP Platform Memory Overview

Dell™ PowerEdge™ M610 Technical Guidebook

NHM-EP Platform Memory Overview

•Platform capability (18 DIMMs):

–Up to 3 channels per CPU

–Up to 3 DIMMS per channel

•Memory Types Supported:

–DDR 1333, 1066, and 800

–Registered (RDIMM) and unbuffered (UDIMM)

–Single-rank (SR), dual-rank (DR), quad-rank (QR)

Up to 3

channels per CPU

1
2	NHM-EP

3

NHM-EP

1 2 3

•System memory Speed (i.e. the speed at which the memory is actually running) is set by BIOS depending on:

–CPU capability

–DIMM type(s) used (memory speed, U/RDIMM, SR/DR/QR)

–DIMM populated per channel

•All channels in a system will run at the fastest common frequency

Up to 3

DIMMs per

Channel

Memory Population Scenarios

CPUs

•Maximum B/W:

–DDR3 1333 across 3 channels

–1 DPC (6 DIMMs)

–Max capacity: 48 GB+

•Balanced Performance:

–DDR3 1066 across 3 channels

–Up to 2 DIMMs per Channel (DPC) (12 DIMMs)

–Max capacity: 96 GB+

•Maximum capacity:

–DDR3 800 across 3 channels

–Up to 3 DPC (18 DIMMs total)

–Max capacity: 144 GB+

10.6 GB/s
10.6
CPU	CPU
10.6

8.5 GB/s
8.5
CPU	CPU
8.5

6.4 GB/s
6.4
CPU	CPU
6.4

E5550

and above

E5520

and above

All

NHM-EP

SKUs

• RAS capabilities: Mirroring

Lockstep

Channel 0 & 1

mirror

each other

Channel 2 unused

CPU

Channel 0 & 1

operate in lockstep

Channel 2 unused

CPU

17