HPE P43022-B21 32GB PC4-25600 Memory

HPE P43022-B21 32GB Dual Rank DDR4-3200 ECC UDIMM

P43022-B21 is the largest unbuffered memory kit HPE lists for its small single socket Gen10 Plus servers. Each module holds 32GB, is built as a dual rank x8 ECC UDIMM and carries a PC4-25600 (DDR4-3200) rating, with CAS 22-22-22 timings at 1.2V.

If you run an ML30 Gen10 Plus tower, a DL20 Gen10 Plus rack server or a MicroServer Gen10 Plus v2, this is the kit that lets you reach each system’s maximum memory. Four modules give 128GB in the ML30 and DL20 Gen10 Plus, and two give 64GB in the MicroServer Gen10 Plus v2.

We offer P43022-B21 in both New and Refurbished condition, subject to stock. Pick a condition on this page to view the price and details.

Key Features At A Glance

• 32GB per module, the highest capacity UDIMM HPE lists for these servers
• ECC unbuffered design required by entry level Gen10 Plus platforms
• Dual rank x8 construction
• Takes the ML30 and DL20 Gen10 Plus to 128GB and the MicroServer Gen10 Plus v2 to 64GB
• New and Refurbished options, subject to stock

How P43022-B21 Differs From The 16GB Kit

HPE offers two main ECC UDIMM capacities for this server family, and they are not just bigger and smaller versions of the same thing. The 16GB P43019-B21 is single rank, while this 32GB kit is dual rank. That extra rank has a direct effect on speed when the memory channels are full.

With an Intel Xeon E processor, HPE rates P43022-B21 at 3200 MT/s when there is one DIMM per channel. Put two of these dual rank modules in the same channel and the speed falls to 2933 MT/s. With a Pentium G6405, the ML30 Gen10 Plus QuickSpecs give 2666 MT/s at one DIMM per channel and 2400 MT/s at two, so the processor matters as much as the memory.

In practice, the trade off is simple. Fill every slot with 32GB modules when capacity is the priority, or use fewer modules if you want the top memory speed and do not need the maximum amount of RAM.

These servers often run in small offices, branch sites and edge locations as file servers, domain controllers or small virtualisation hosts. Moving from 16GB to 32GB modules is often the easiest way to add headroom for extra virtual machines without replacing the server.

Population Notes For Each Platform

• DL20 Gen10 Plus: four slots across two channels, fill in the order 3-A, 1-B, 4-C, 2-D. HPE does not allow different capacities in the same channel when a 32GB UDIMM is fitted.
• ML30 Gen10 Plus: four slots, up to 128GB with four P43022-B21 kits.
• MicroServer Gen10 Plus v2: two slots, filled 2-A then 1-B. HPE lists a 32GB plus 16GB layout as an optional configuration, but generally recommends against mixing capacities.

All three servers support ECC UDIMMs only. Registered or load reduced DIMMs and non-ECC desktop memory will not work.

New P43022-B21 Modules

New modules are unused. Choose New on this page to see its condition and warranty information.

Refurbished P43022-B21 Modules

Refurbished modules are pre-owned and priced below new. Choose Refurbished to see the condition and warranty for that option.

P43022-B21 Technical Specifications

Supported Servers

P43022-B21 appears in HPE QuickSpecs for:

• HPE ProLiant DL20 Gen10 Plus
• HPE ProLiant ML30 Gen10 Plus
• HPE ProLiant MicroServer Gen10 Plus v2

HPE does not list it for Gen9 models such as the ML10, ML30 or DL20 Gen9. If you have one of those, get in touch so we can suggest the right memory.

Other Parts You May Need

• HPE P43019-B21 16GB single rank ECC UDIMM
• HPE P11444-091 32GB DDR4 3200MHz memory
• HPE P20503-001 32GB DDR4-3200 module
• Server controllers
• HPE server power supplies
• Server memory kits

Confirming The Fit

• Check the server model is one of the three Gen10 Plus systems above
• Look for PC4-3200AA-E on existing modules, which means ECC unbuffered
• Decide whether you need 32GB dual rank or 16GB single rank modules
• Match the label to P43022-B21, P44878-001 or P43024-0A1

Buying P43022-B21 In The UK

We supply HPE server memory throughout the UK, and delivery choices appear at checkout. Need a second opinion before you buy? Contact us with the server model, serial number and the details from your current memory labels.

Frequently Asked Questions

What is the maximum memory with P43022-B21 in a DL20 Gen10 Plus?

The DL20 Gen10 Plus has four slots, so four P43022-B21 kits give the maximum of 128GB.

Why does my server run this memory at 2933 MT/s?

HPE rates the 32GB dual rank UDIMM at 2933 MT/s when two are fitted in the same channel with a Xeon E processor. One per channel runs at 3200 MT/s.

Can I combine P43022-B21 with the 16GB P43019-B21?

It depends on the server. The DL20 Gen10 Plus does not allow different capacities in one channel when a 32GB UDIMM is fitted, and HPE generally recommends matching capacities.

How do I see the warranty for New and Refurbished versions?

Select New or Refurbished on this page and the condition and warranty details for that option are displayed.

Do you send this memory to UK addresses?

Yes. We deliver anywhere in the UK, with delivery options shown at checkout.