Dell PowerEdge M710 Manual técnico - Página 19

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Dell PowerEdge M710 Manual técnico
Dell™ PowerEdge™ M710 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)
• 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
Memory Population Scenarios
• 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+
• RAS capabilities:
Up to 3
channels
per CPU
10.6 GB/s
10.6
CPU
10.6
8.5 GB/s
8.5
CPU
8.5
6.4 GB/s
6.4
CPU
6.4
Mirroring
Channel
0 & 1
mirror
CPU
each
other
Channel
2 unused
1
2
NHM-EP
3
CPUs
E5550
CPU
and above
E5520
CPU
and above
All
NHM-EP
CPU
SKUs
Lockstep
Channel
0 & 1
operate in
lockstep
Channel
2 unused
NHM-EP
1 2 3
Up to 3
DIMMs per
Channel
CPU
19