Lenovo 70LU, User Manual And Hardware Maintenance Manual

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Memory module
Note: The memory modules are extremely sensitive to ESD. Ensure that you read and understand “Handling
static-sensitive devices” on page 40 first and carefully perform the operation.
• “Memory module installation rules” on page 69
• “Removing the memory module” on page 70
• “Installing the memory module” on page 70
Memory module installation rules
Features
Your server has four memory slots.
• Each slot supports 4 GB, 8 GB, and 16 GB double data rate 4 (DDR4) unbuffered dual inline memory
modules (UDIMMs) with Error Checking and Correcting (ECC) technology.
• The minimum system memory is 4 GB (only one 4 GB memory module installed).
• The maximum system memory is 64 GB (one 16 GB memory module installed in each memory slot).
Guidelines
• Memory modules from different manufacturers are supported.
• All memory modules to be installed must be the same type with the same voltage.
• If your server comes with 2400 MHz memory modules and a microprocessor that supports a maximum of
2133 MHz memory, the data rate of your memory modules will be limited to 2133 MHz.
• If you mix memory modules with different frequencies in the same server, all the memory modules run at
the speed of the memory module with the lowest frequency
• If you install memory modules with different capacity, install the memory module that has the highest
capacity first.
Installation order
The following illustration shows the installation order for the four memory slots. Install memory modules in
the numerical order as shown.
Chapter 5
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Replacing hardware
69