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Dell PowerEdge R640 - Memory Installation

Dell PowerEdge R640 - Memory Installation 4 October 2023

The Dell PowerEdge R640 server can accommodate up to 24 DDR4 DIMM memory sticks supporting RDIMM/LRDIMM, with speeds up to 2666 MT/s, and a total capacity of up to 3TB. Alternatively, up to 12 NVDIMM modules with a capacity of up to 192GB can be installed. Only registered DDR4 DIMM modules with ECC are supported. We'll demonstrate how to upgrade the memory on this server. Since it's a dual-processor server, you should add memory in pairs to ensure that each processor has an equal amount of memory. We'll add two DIMM sticks to each server. 

Dell PowerEdge R640

You'll need to turn off the server, slide it out of the rack, and remove the lid. Unused DIMM slots are covered by blanks.

Dell PowerEdge R640

Currently, there are two sticks per processor in the server, each being 64GB. We'll need to add two more.

You can refer to the inside of the server's lid for the memory module installation sequence. It is recommended to install in the order of 1, 2, 4 for each processor. Slot numbers are indicated on the same diagram. The slots for the first processor have a "A" prefix, while the second one has a "B".

Dell PowerEdge R640

To access the blanks and install the memory, you'll need to remove the air duct located behind the fans.

Dell PowerEdge R640

Dell PowerEdge R640

Next, insert the sticks into the fourth slot.

Dell PowerEdge R640

Slot numbers can also be found on the air duct you've just removed.

Dell PowerEdge R640

Mission accomplished. Memory has been added.

Dell PowerEdge R640

Now, reinstall the air duct and verify the slot numbers.

Dell PowerEdge R640

Assemble the server, turn it on, and check its performance.


Dell
  • 1U (rackmount)
  • up to 2 Xeon Scalable
  • up to 2048 GB (24 x DDR4)
  • 4LFF Bay 3.5" (Hot Swap)
  • 2 x PSU (Hot Plug)
Dell
  • 1U (rackmount)
  • up to 2 Xeon Scalable
  • up to 2048 GB (24 x DDR4)
  • 8SFF Bay 2.5" (Hot Swap)
  • 2 x PSU (Hot Plug)
Dell
  • 1U (rackmount)
  • up to 2 Xeon Scalable
  • up to 2048 GB (24 x DDR4)
  • 10SFF Bay 2.5" (Hot Swap)
  • 2 x PSU (Hot Plug)
Dell
  • 1U (rackmount)
  • up to 2 Xeon Scalable
  • up to 2048 GB (24 x DDR4)
  • 10SFF (4x NVME) Bay 2.5" (Hot Swap)
  • 2 x PSU (Hot Plug)
Dell
  • 1U (rackmount)
  • up to 2 Xeon Scalable
  • up to 2048 GB (24 x DDR4)
  • 10SFF (8x NVME) Bay 2.5" (Hot Swap)
  • 2 x PSU (Hot Plug)