Dell PowerEdge T410 - LCD Status Messages (Optional)

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PowerEdge T410 Technical Guide 28
 DIMMs must be installed in each channel starting with the DIMM slot farthest from the
processor (slot 0)
 For each processor, Channel 0 supports up to two DIMMs and Channel 1 and 2 support one
DIMM each
7.4 DIMM Slots
The T410 planar provides four 72-bit (240-pin) sockets per processor for DIMM memory modules.
These modules can be DDR3 800/1066/1333 Registered DIMMs. The DIMMs are configured as 72 bits
wide to provide for ECC, which is performed by the memory controller in the processor.
7.5 Low Voltage DIMMs
With the introduction of the Intel
®
Xeon
®
processor 5600 series, low voltage (LV) DIMMs have been
added for selected memory configurations for the PowerEdge T410. Only this processor series
supports operating DIMMs at the lower voltage (1.35V, also referred to as DDR3L). The Intel Xeon
5500 processor series does not support low voltage operation. However, they can be operated at
1.5V. Therefore, DDR3L DIMMs can be used in systems with either processor series, and the platform
will automatically choose the appropriate operating voltage based on the processor populated.
DDR3L DIMMs will be qualified and available for use with Intel Xeon 5500 processor series mid-year
2011. Contact your Dell Sales Representative or visit Dell.com for more information.
LV DIMMs operate at 1.35V, creating power savings vs. standard memory which operates at 1.5V. In
order to achieve power savings, all DIMMs in the system must be of the LV type. If the system detects
a mixture of standard and LV DIMMs, the BIOS will operate all memory at 1.5V. When operating at
the lower voltage, additional frequency and population restrictions can take effect. For example, 3
DIMMs per channel operation is not supported at low voltage.
The DDR3L standard is completely backwards-compatible at standard voltage. DDR3L DIMMs can
operate at 1.5V without any limitations beyond standard voltage DDR3 DIMMs. As part of the addition
of LV DIMMs, the platform has certain default behaviors. Whenever possible, if there is no
performance degradation, the platform will default to 1.35V operation when using DDR3L DIMMs. In
certain cases, where a configuration is populated that cannot support 1.35V or a performance
degradation would result, the platform defaults to 1.5V operation. There are also options to override
default voltage within allowed limits.
7.6 Speed
The memory speed of each channel depends on the memory configuration:
 For single- or dual-rank memory modules:
o One memory module per channel supports up to 1333 MT/s
o Two memory modules per channel supports up to 1066 MT/s
 For quad-rank memory modules:
o One memory module per channel supports up to 1066 MT/s
o Two memory modules per channel are limited to 800 MT/s, regardless of memory
module speed
If memory modules with different speeds are installed, they will operate at the fastest common
frequency of the installed memory module(s).
7.7 Sparing
Systems with the Intel Xeon processor 5600 series support memory sparing. Sparing requires identical
memory installed in all three channels. One of the three channels is considered the Spare Channel,