Question 1

How much RAM can a Dell PowerEdge R740 support?

Accepted Answer

The Dell PowerEdge R740 has 24 DIMM slots and supports up to 1.5 TB of DDR4 ECC memory using 64 GB LRDIMMs. The most common production configuration is 256 GB (8× 32 GB RDIMM) or 512 GB (16× 32 GB RDIMM) for virtualization workloads.

Question 2

Can I use non-Dell memory in a PowerEdge server?

Accepted Answer

Yes. Dell PowerEdge servers accept any standard DDR4/DDR5 ECC RDIMM or LRDIMM that meets JEDEC specifications. Dell-branded memory is simply Samsung, SK Hynix, or Micron modules with a Dell part number. Third-party modules of the same spec work identically at significant savings.

Question 3

What speed memory should I buy for my Dell server?

Accepted Answer

Match the maximum speed your processor supports. Xeon Scalable Gen2 (R640/R740) supports DDR4-2933. Gen3 supports DDR4-3200. Gen4/5 (R660/R760) supports DDR5-4800. Using faster-rated DIMMs is fine — they simply clock down to the CPU maximum. Using slower DIMMs reduces all memory to the slowest module speed.

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