Cisco UCS B250 M1 Catatan Instalasi dan Layanan - Halaman 25
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S e n d d o c u m e n t c o m m e n t s t o u c s - d o c f e e d b a c k @ c i s c o . c o m
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Low-Voltage DIMM Considerations
The server can be ordered with low-voltage (1.35 V) DIMM pairs or standard-voltage (1.5 V) DIMM
pairs. Note the following considerations:
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There is a setting in the BIOS Setup utility that you can use to change the DDR memory mode when the
server has all low-voltage DIMMs installed. To access this setting, follow these steps:
Step 1
Enter the BIOS setup utility by pressing the F2 key when prompted during bootup.
Step 2
Select the Advanced tab.
Step 3
Select Low Voltage DDR Mode.
In the pop-up window, select either Power Saving Mode or Performance Mode.
Step 4
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Step 5
Press F10 to save your changes and exit the setup utility, or you can exit without saving changes by
pressing Esc.
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Populate DIMMs of different size and organization in separate memory channels. Populating
different sized DIMMs within a channel is not supported. For example you cannot put single-rank
4GB DIMMs in the same channel as dual-rank 4GB DIMMs.
The two low-voltage DIMMs within a DIMM pair must have the identical manufacturer, type, speed,
and size. Cisco provides spare DIMMs for this product in matched pair kits.
Low-voltage DIMM pairs and standard-voltage DIMM pairs can be mixed in the same server. Note
that this causes the system BIOS to default to standard-voltage operation (Performance Mode). That
is, the server cannot operate in the Power Saving Mode unless all DIMM pairs in the server are
low-voltage DIMMs.
Power Saving Mode–Enables low-voltage memory operation. This setting is available only if all
DIMMs installed are low-voltage DIMMs.
Performance Mode–Disables low-voltage memory operation. If you mix low-voltage DIMM pairs
with standard-voltage DIMM pairs, the system defaults to this setting.
Cisco UCS B250 Extended Memory Blade Server Installation and Service Note
Memory and Performance
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