HPE ProLiant DL20 Gen11 Memory

Genuine HPE DDR5 Standard Memory for the HPE ProLiant DL20 Gen11, new and refurbished, tested for compatibility before shipping. This is an entry server with an entry memory system: four unbuffered DIMM slots on two channels, two kits to choose from, and a 128GB ceiling. The decisions are how many slots to fill and which capacity, and the rules for both are short.

DL20 Gen11 Memory Specifications

• Type: HPE DDR5 Standard Memory, Unbuffered (UDIMM), ECC; HPE states Standard Memory is required to realize the performance listed in its document
• Slots: 4 DIMM slots — 2 channels per processor, 2 DIMMs per channel, all on the single processor
• Kits listed: 16GB single rank x8 and 32GB dual rank x8, both DDR5-4800 CAS-40-39-39 Unbuffered Standard Memory, one DIMM per kit
• Maximum: 128GB, as four 32GB UDIMMs at 4400 MT/s
• Speed: every processor HPE lists for this server supports DDR5 at 4400 MT/s; HPE states the server runs at up to 4400 MT/s with Intel Xeon processors when two dual-rank DIMMs are installed in different channels
• Population: HPE recommends 1, 2 or 4 DIMMs for balanced performance, and requires symmetric configurations within each channel — the same capacity (16GB or 32GB) in both slots of a channel
• Not listed: RDIMM, LRDIMM and 3DS modules; memory from previous ProLiant generations is not qualified or warranted with this server
• Ordering: the -B21 kits sold here are the stand-alone memory SKUs; HPE's -F21 variants are for factory-integrated servers only

Unbuffered DIMMs only, in matched pairs, at 4400 MT/s. The DL20 Gen11 takes HPE DDR5 Standard Memory UDIMMs in four slots on two channels; HPE requires the same capacity in both slots of a channel and lists 16GB and 32GB kits. The kits are DDR5-4800 modules, but every processor listed for this server runs memory at 4400 MT/s, so that is the speed to expect. Registered DDR5 from other Gen11 servers is not listed for it.

How much memory can the DL20 Gen11 hold?

Two channels means two DIMMs is the point at which both channels are working; a single DIMM leaves one channel idle. Beyond that, the choice between two 32GB modules and four 16GB modules comes down to whether you expect to add more later — two 32GB kits leave two slots free for a second pair, four 16GB kits do not. The 4400 MT/s figure is the platform's ceiling for every listed processor, so there is no faster processor to unlock a higher grade on this server.

Choosing the Right DL20 Gen11 Memory

• Buy in pairs, one per channel. Two DIMMs populate both channels; HPE's recommendation of 1, 2 or 4 modules reflects that channel layout.
• Keep each channel symmetric. HPE requires the same capacity in both slots of a channel — 16GB with 16GB, 32GB with 32GB — so a 16GB and a 32GB kit cannot share a channel.
• Unbuffered only. This server takes UDIMMs. Registered DDR5 from the DL320 or DL360 Gen11 is a different module type and is not listed for the DL20 Gen11.
• Expect 4400 MT/s, not 4800. The kits are DDR5-4800 modules, but every processor listed for this server runs memory at 4400 MT/s, and the speed follows the processor.
• Stand-alone SKUs end in -B21. A -F21 part number on a quote is HPE's factory-integration twin of the same kit.

Complete Your DL20 Gen11 Build

Memory is the one compute upgrade on this server, since the processor is factory-installed. Pair it with DL20 Gen11 drives, storage controllers, networking adapters and power supplies, or browse the full DL20 Gen11 parts listing. Registered DDR5 for the larger Gen11 servers is under DL320 Gen11 memory and all HPE Gen11 server memory; the entry tower equivalent is ML30 Gen11 memory. Background reading: maximum memory configurations for HPE ProLiant Gen11 servers, understanding memory rank in HPE servers and why memory speed matters. Every model we stock is indexed under HPE parts by server model.

DL20 Gen11 Memory FAQ

How much RAM does the DL20 Gen11 support?
128GB, as four 32GB DDR5 UDIMMs at 4400 MT/s. The server has four DIMM slots on two memory channels at two DIMMs per channel, and HPE lists 16GB and 32GB kits for it.

What type of memory does the DL20 Gen11 use?
HPE DDR5 Standard Memory - unbuffered ECC UDIMMs. The two kits listed are a 16GB single rank x8 module and a 32GB dual rank x8 module, both DDR5-4800 with CAS-40-39-39 timings.

Can I use registered DIMMs in a DL20 Gen11?
No. HPE lists only unbuffered DDR5 Standard Memory for this server. Registered and load-reduced DDR5 modules from other Gen11 servers are a different module type and are not listed.

Why does DL20 Gen11 memory run at 4400 MT/s when the kits are DDR5-4800?
Because memory speed follows the processor, and every processor HPE lists for this server - Xeon 6300, Xeon E-2400 and Pentium G7400 - supports DDR5 at 4400 MT/s. The kits are rated for 4800 but run at the processor's 4400.

Do I need to install DL20 Gen11 memory in matched pairs?
HPE requires symmetric configurations within each channel - the same capacity in both slots of a channel - and recommends 1, 2 or 4 DIMMs. Two identical modules, one per channel, is the standard starting point, and four identical modules is the maximum.

What is the difference between the -B21 and -F21 memory part numbers?
The same module ordered two ways. HPE states the -B21 SKUs are for stand-alone memory orders and the -F21 SKUs are used when configuring a server with factory-integrated DIMMs. The kits sold here are the -B21 stand-alone parts.

✅ Looking for a specific DL20 Gen11 memory module? Browse our full selection below.

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