Memory module

Attention:

Do not open your computer or attempt any repair before reading and understanding the Read this first: Important safety information.

Your computer has four memory slots for installing or replacing DDR4 DIMMs. When installing or replacing a memory module, use the following guidelines:

Use any of DDR4 ECC UDIMMs or DDR4 non-ECC UDIMMs for your computer. Do not install ECC and non-ECC UDIMMs into the same computer.
Use 4 GB, 8 GB, 16 GB, or 32 GB non-ECC UDIMMs in any combination up to a maximum of 128 GB.
Use 8 GB or 16 GB ECC UDIMMs in any combination up to a maximum of 64 GB.

Install memory modules in the alphabetic order as shown.

Figure 1. Memory module installation sequence

To install or replace a memory module, do the following:

Prepare your computer. See Preparing your computer.
Lay the computer on its side for easier access to the system board.
Locate the memory slots. See Parts on the system board.
Remove any PCIe cards that might prevent your access to the coin-cell battery. See PCIe card.
To remove a memory module, open the retaining clips and gently pull the memory module out of the memory slot.
Figure 2. Removing a memory module
To install a memory module, do the following:
1. Open the retaining clips of the memory slot.
  Figure 3. Opening the retaining clips
2. Position the new memory module over the memory slot. Ensure that the notch 1 on the memory module is aligned with the key 2 in the slot. Push the memory module straight down into the slot until the retaining clips completely close.
  Note: Do not touch the circuit board of the memory module.
  
  Figure 4. Installing a memory module
Reinstall any PCIe cards if you have removed them.

What to do next:

To work with another piece of hardware, go to the appropriate section.
To complete the installation or replacement, go to Completing the parts replacement.