4.8GT/s, 5.86GT/s and 6.4GT/s with 11 southbound lanes (nine data, one CRC and one spare) and 14
Northbound lanes (12 data, one CRC and one spare).
The DDR3 interface supports x4 and x8 single-rank, dual-rank and quad-rank RDIMMs — up to two
RDIMMS per channel. Each DDR3 channel supports a maximum of eight ranks. DDR3 speeds are
800MT/s, 978MT/s, 1066MT/s and 1333MT/s. DRAM technology comes in 1Gb and 2Gb sizes. DIMM
capacity is 2GB, 4GB, 8GB, 16GB or 32GB (16GB with QR DIMMS only).
Memory RAS support
The Intel Xeon processor 6500 and 7500 series supports high-availability memory modes including
rank and DIMM sparing as well as memory mirroring. The M910 supports rank sparing only and
mirroring as shown in Table 10.
Sparing
Type
Rules enforced
Rank
The capacity of the spare
rank must be greater
than that of any other
rank on the channel
Sparing
For information, see the System Memory section in the Installing Blade Components chapter of the
Dell PowerEdge Modular Systems Hardware Owner's Manual
Mirroring
For mirroring, the M910 will support two-processor/four-processor configurations with 32 DIMMs
only. When mirroring is enabled, only half of the physical memory will be visible to the system
software. A full copy of the memory is maintained, and in the event of an uncorrectable error, the
system will switch over to the mirrored copy. In two-processor mode, the mirroring will be inter-
node with hemisphere mode enabled. In this case, the memory controller (MBox) of CPU1 is
mapped to the corresponding MBox of CPU2.
For four-processor configurations, the PowerEdge M910 also supports mirroring in the inter-socket
mode (intra-socket is not possible in four-processor configurations because each processor has
only one MBox connected to memory buffers). In this four-processor case, the memory on CPU1 is
mirrored with memory on CPU3, while memory on CPU2 is mirrored with memory on CPU4.
Supported memory configurations
See the System Memory section in the Installing System Components chapter in the
M910 Systems Hardware Owner's Manual
PowerEdge M910 Technical Guide
Table 10.
Sparing and mirroring support
Mirroring
1P
No support
on Dell.com/Support/Manuals.
24
2P
4P
Inter-socket
Inter-
(hemisphere
socket
mode
enabled)
on Dell.com/Support/Manuals.
Rules enforced
32 DIMM only,
Mirrored must match
Dell PowerEdge
ページを印刷する