HPE ProLiant ML30 Gen11 Upgrade Guide: RAM and Storage

Updated Oct. 9, 2026 · Written from this device's verified specifications

This guide covers adding memory and storage to the HPE ProLiant ML30 Gen11 tower server. The short answer: it takes up to 128 GB of DDR5 ECC unbuffered memory in four slots, and the drive options depend on which chassis you own (4 LFF or 8 SFF).

At a glance

  • 4 DIMM slots, DDR5 ECC UDIMM only, up to 32 GB per module and 128 GB in total.
  • Memory runs at 4400 MT/s with one DIMM per channel and slower with all four slots filled.
  • Drive bays depend on the chassis: 4 x 3.5 inch LFF or 8 x 2.5 inch SFF hot-plug.
  • There is one onboard PCIe 3.0 x2 NVMe M.2 slot, intended as a boot drive.
  • We have no confirmed details on swapping the processor, so there is no CPU section.
DDR5 ECC UDIMM slot4 × DDR5 DIMM · up to 128 GB total · 4400 MT/s · ECC
3.5" LFF drive bay4 × HDD / SSD 3.5" (SATA / SAS) · up to 20 TB
2.5" SFF hot-plug drive bay8 × HDD / SSD 2.5" (SATA / SAS) · up to 7.68 TB
Onboard M.2 slotSSD M.2 2280 / M.2 22110 (NVMe)
4 × DIMM · DDR5up to 128 GB total3.5" LFF drive bay4 × HDD / SSD 3.5" (SATA / SAS) · up to 20 TB2.5" SFF hot-plug drive bay8 × HDD / SSD 2.5" (SATA / SAS) · up to 7.68 TBOnboard M.2 slotSSD M.2 2280 / M.2 22110 (NVMe)
Schematic of the upgradeable slots (not to scale). Check the owner's manual for their exact positions.

Lifecycle and support

A current model: sold new and supported.

20232024202520262027Today11 · Release · Jan. 10, 2023
Filled dots: dates published by the manufacturer. Hollow dots: estimates from third-party sources.
MilestoneDate
Release
First available to buy.		 Jan. 10, 2023 Estimate Third-party date from eosl.date, listed as Jan. 10, 2023; the column header is inferred to be the release date. HPE has not published its own launch date.
Source ↗

Dates not listed haven't been published by the manufacturer or a reliable third party.

Memory (RAM) upgrades

The ML30 Gen11 has four DIMM slots: one processor, two memory channels, and two DIMMs per channel. It uses full-size DDR5 ECC unbuffered DIMMs (UDIMMs). Nothing is soldered on, so all memory can be replaced. Each module can be up to 32 GB, for a maximum of 128 GB (4 x 32 GB).

Only ECC UDIMMs work. Non-ECC UDIMMs, RDIMMs and LRDIMMs are not supported. HPE lists two qualified kits: P64336-B21 (16 GB, single-rank) and P64339-B21 (32 GB, dual-rank), and recommends using HPE-qualified DIMMs.

Speed drops as you fill the slots. With one DIMM per channel, both 16 GB and 32 GB modules run at 4400 MT/s. With two per channel, 16 GB modules run at 4000 MT/s and 32 GB modules at 3600 MT/s. Fill the slots in the order 2A, 4B, 1C, 3D, and stick to 1, 2 or 4 DIMMs for balanced performance. Do not mix capacities within a channel, and mixing capacities across the server is not recommended.

Buying tips

  • Buy ECC UDIMM (unbuffered) only. Do not buy RDIMM, LRDIMM or non-ECC modules.
  • Choose HPE-qualified modules, such as the 16 GB or 32 GB kits listed above.
  • Buy matching modules rather than mixing sizes.
  • If speed matters more than capacity, two 32 GB modules (one per channel) keep the full 4400 MT/s.
  • Ignore any listing that claims more than 128 GB or 32 GB per slot for this model.

Storage upgrades: drive bays, M.2 and PCIe

Check which chassis you have first, because it decides what fits. There are three variants: 4 x 3.5 inch LFF non-hot-plug (SATA only), 4 x 3.5 inch LFF hot-plug (SAS or SATA), and 8 x 2.5 inch SFF hot-plug (SAS or SATA, HDD or SSD). The hot-plug models are the ones that support SAS drives. The largest drives in HPE's listed configurations are 20 TB for the LFF bays and 7.68 TB SSDs for the SFF bays. We could not find a drive thickness limit for the bays, so check the owner's manual before buying unusual drives.

There is also one onboard M.2 slot, PCIe 3.0 x2 with NVMe support, which HPE positions as a boot drive. We could not confirm which M.2 lengths fit. 2280 and 22110 are commonly assumed but unverified, so confirm before buying.

For extra storage, the server has four PCIe slots: slot 1 is PCIe 5.0 x16 (75 W), and slots 2 to 4 are PCIe 4.0 x8 (25 W each). HPE suggests putting a PCIe x8 storage controller in slot 1 and a network card in slot 2 for best performance. With an Intel Pentium processor, slot 1 runs at PCIe 4.0 speed instead. Intel VROC SATA software RAID is included, and HPE Smart Array controllers are optional. An optional 9.5 mm SATA optical drive is also available; no drives ship as standard.

Buying tips

  • Work out whether you have 4 LFF or 8 SFF bays before ordering.
  • On the non-hot-plug LFF model, buy SATA drives only.
  • SAS drives need a hot-plug model.
  • Confirm M.2 length compatibility before buying an NVMe stick.
  • For a storage controller card, check that it fits an x8 slot and stays within the slot's power limit.

Cheapest compatible right now

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How to upgrade

Before you start

  • Back up any data on the server and note your RAID or boot configuration.
  • Check the Intel/HPE firmware and BIOS version and look for updates on HPE's support pages.
  • Confirm which chassis you have (4 LFF non-hot-plug, 4 LFF hot-plug, or 8 SFF).
  • Have the owner's manual or user guide open for exact disassembly steps.
  • Use an anti-static wrist strap or touch bare metal on the chassis before handling parts.

Steps

  1. Back up and shut down
    Back up your data, then shut the server down properly from the operating system.
  2. Power off and unplug
    Switch the server off, unplug the power cord and any other cables, and wait a moment before opening it.
  3. Ground yourself
    Wear an anti-static strap or touch bare metal on the chassis. Handle DIMMs and drives by their edges.
  4. Open the case
    Remove the access panel as described in the owner's manual. Release methods vary, so follow the manual for exact steps.
  5. Install the part
    For memory, fit modules in the order 2A, 4B, 1C, 3D, following the manual's slot guidance. For a drive, use the correct bay and carrier for your chassis. For M.2 or a PCIe card, fit it to the onboard slot or the right PCIe slot.
  6. Close up and reconnect
    Refit the access panel and reconnect the power cord and other cables.
  7. Check that the server sees the part
    Power on and enter the BIOS or system utilities to confirm the new memory amount, drive or card is detected. Check the memory speed too, and set up RAID or format the drive if needed.

Good to know

  • There is no CPU section because we could not confirm a processor upgrade path. Check HPE's documents before buying a CPU.
  • Supported M.2 lengths were not confirmed. 2280 and 22110 are unverified.
  • We could not find a drive thickness limit for the 3.5 inch or 2.5 inch bays.
  • Memory speed is quoted as 4800, 4400 and 3600 MT/s in different places. Treat 4400 MT/s with one DIMM per channel as the practical figure.
  • The user guide's generic part-number decoder mentions up to 256 GB, 6400 MT/s and RDIMMs, but the server-specific specs say ECC UDIMM only and 128 GB maximum.
  • One QuickSpecs copy found online has apparent carry-over errors from the previous generation, such as a C262 chipset entry and a typo reading 7.68 GB instead of TB. Verify details against the current HPE document.

Frequently asked questions

How much RAM can the HPE ProLiant ML30 Gen11 take?

Up to 128 GB, using four 32 GB DDR5 ECC unbuffered DIMMs. The largest module supported is 32 GB.

Does the ML30 Gen11 support non-ECC or registered memory?

No. Only ECC UDIMMs are supported. Non-ECC UDIMMs, RDIMMs and LRDIMMs are not.

What speed does the memory run at?

HPE's own pages disagree: the store lists 4800 MT/s, while the data sheet says 4400 MT/s. In practice expect 4400 MT/s with one DIMM per channel, and 4000 MT/s (16 GB) or 3600 MT/s (32 GB) with two per channel.

Can I add an SSD to the ML30 Gen11?

Yes, in several ways. The drive bays take SATA SSDs on all chassis, and SAS SSDs on the hot-plug models. There is also one NVMe M.2 slot (PCIe 3.0 x2) intended for a boot drive. Confirm the M.2 length first.

What is the biggest drive I can fit?

HPE's listed configurations go up to 20 TB per drive in the LFF bays and 7.68 TB SSDs in the SFF bays. Those are the largest listed, not necessarily hard limits.

Can I upgrade the CPU?

We could not confirm a CPU upgrade path. The server is offered with Intel Xeon E processors (up to 8 cores, 95 W) or a Pentium G7400, but check HPE's QuickSpecs and the user guide before buying a processor. Note that with a Pentium, PCIe slot 1 runs at PCIe 4.0 speed.

Official documents and references

This guide was written with AI assistance from the compatibility data PartsPrices verified against the manufacturer's documents. Always check your exact model and the owner's manual before buying or opening your computer.