Manualshelf

User Manual

ManualsBrandsTechMikeNY ManualsComputers & AccessoriesHigh-End Virtualization Server 12-Core 128GB RAM 12TB RAID Dell PowerEdge R710 Bezel and Rails (Certified Refurbished)
31323334353637383940
Dell
PowerEdge R710 Technical Guide 33
Memory Channels Figure 10.
Speed
The memory frequency is determined by a variety of inputs:
• Speed of the DIMMs
• Speed supported by the processor
• Configuration of the DIMMs
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 support up to 1066 MT/s
o Three memory modules per channel are limited to 800 MT/s, regardless of the memory module
speed
• 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 speed of the slowest installed
memory module(s).
DIMM Slots
The PowerEdge R710 has 18 DIMM slots for memory. It does not have any riser cards for DIMM population.
The first DIMM slot in each channel is color-coded with white ejection tabs for ease of installation. The DIMM
sockets are placed 450 mils (11.43 mm) apart, center-to-center to provide enough space for sufficient airflow
to cool stacked DIMMs.
Low Voltage DIMMs
With the introduction of the Intel
®
Xeon
®
processor 5600 series, low voltage (LV) DIMMs have been added in
selected memory configurations for the PowerEdge R710. 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, due to the backwards-compatible nature of low voltage DIMMs, 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.