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Lenovo ThinkServer TD350 70DG User Manual And Hardware Maintenance Manual Page 91

Machine types: 70dg, 70dh, 70dj, 70dk, 70dl, 70dm, 70dn, and 70dq user guide.
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For a list of supported ThinkServer memory module options, go to:
http://lenovoquickpick.com/usa/home/thinkserver/rack-and-tower-server
Before installing a memory module, ensure that you observe the following guidelines:
• All memory modules to be installed must be the same type (LV RDIMM or RDIMM).
• When you install memory modules with different ranks in one channel, start from the farthest memory slot
in the channel and install the memory module that has the most ranks first.
• If you install 1.35 V memory modules and 1.50 V memory modules into the memory slots for the same
microprocessor, you must configure the working voltage in the BIOS so that all the memory modules
run at 1.50 V.
• When you install memory modules with different frequencies into the memory slots for the same
microprocessor, all the memory modules run at the lowest frequency.
• It is recommended that you install the low-voltage memory modules into the memory slots for the same
microprocessor to ensure low power consumption.
• It is recommended that you install the high-frequency memory modules into the memory slots for the
same microprocessor to ensure high performance.
The following illustration shows the locations of all memory slots on a system board that has two
microprocessors (also known as CPUs) installed.
Figure 39. Memory slots on the system board
.
Chapter 6
Replacing hardware
77

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