HPE P38454-B21 32GB DDR4-3200 Memory Kit

HPE P38454-B21 32GB Single Rank x4 DDR4-3200 Registered Memory Kit

HPE P38454-B21 is the option kit number for a 32GB registered DDR4 module rated at 3200 MT/s. What sets it apart from most 32GB DDR4 kits is its single rank x4 layout: one rank of x4 DRAM chips, where older 32GB modules usually needed two ranks to reach the same capacity.

HPE lists the kit in the memory options for its AMD EPYC based ProLiant Gen10 Plus servers, including the DL385 Gen10 Plus. It is a good fit when you want 32GB per slot with a single rank module, or when you need to match modules that are already in a server.

Both New and Refurbished stock can be listed for this kit, subject to availability. Choose a condition on this page to see its price and details.

Key Features At A Glance

• 32GB in one registered DIMM with ECC protection
• Single rank x4 build for 32GB per slot
• Full DDR4-3200 rating on supported AMD Gen10 Plus platforms
• Option kit number that pairs with spare P39381-001 and module P38520-1A1
• Offered in New or Refurbished condition, subject to stock

Option, Spare And Assembly Numbers Explained

HPE uses several numbers for the same physical module, and knowing which is which saves a lot of confusion when you replace memory.

• P38454-B21 is the option kit number. The -B21 suffix is what HPE uses when the part is sold as an upgrade or included in a factory build.
• P39381-001 is the spare part number, used by HPE service when a failed module is replaced. Spare labels on this module describe it as 32GB PC4-3200AA-R 4Gx4.
• P38520-1A1 is the assembly number that often appears on the module label itself.

Resellers cross-reference all three to the same 32GB single rank x4 module, so a label showing any of them points to this part.

Single Rank x4 Versus Dual Rank 32GB Kits

For a long time, 32GB DDR4 server modules were mostly dual rank x4. Single rank 32GB kits such as P38454-B21 use higher density DRAM chips to reach the same capacity in one rank. The capacity is identical, but the rank count is not, and HPE servers do not like mixed configurations, so match what is already installed wherever you can.

The HPE DL385 Gen10 Plus data sheet sets a few rules that apply here. Each processor has 8 memory channels with 2 DIMMs per channel, giving 32 slots in a two processor system. x4 and x8 modules cannot be mixed, and RDIMMs cannot be mixed with LRDIMMs. HPE also states that 8GB to 128GB kits run at 3200 MT/s at one or two DIMMs per channel on that platform, although the final speed still depends on the processor fitted.

Intel based Gen10 Plus servers such as the DL380 Gen10 Plus list a different single rank x4 32GB kit, P40007-B21, in their QuickSpecs. If you run an Intel system, check that document before choosing this AMD focused option.

New P38454-B21 Memory Kits

New kits are unused stock. When you select New, the page shows the condition and the warranty that applies.

Refurbished P38454-B21 Memory Kits

Refurbished kits are previously used modules at a lower price point. Select Refurbished to see the condition information and warranty for that option.

P38454-B21 Technical Specifications

Compatible HPE Servers

HPE lists P38454-B21 in the memory options for the ProLiant DL385 Gen10 Plus. Specialist resellers also list it for these AMD based Gen10 Plus systems:

• HPE ProLiant DL385 Gen10 Plus and DL385 Gen10 Plus v2
• HPE ProLiant DL325 Gen10 Plus and DL325 Gen10 Plus v2
• HPE ProLiant DL365 Gen10 Plus
• HPE ProLiant DL345 Gen10 Plus

Gen11 servers use DDR5 memory, so this DDR4 kit will not fit them. If you are unsure, send us your server model and we will check the QuickSpecs with you.

Related Memory On Our Site

• HPE P39381-001 32GB DDR4-3200 spare module
• HPE P38520-1A1 32GB DDR4-3200 memory module
• HPE P07646-B21 32GB DDR4-3200 memory kit
• HPE P20504-001 64GB DDR4-3200 memory
• HPE P07640-B21 16GB PC4-25600AA-R memory

For other components, see our server motherboards and server power supplies.

Checking The Part Before You Order

• Read the module label for P38454-B21, P39381-001 or P38520-1A1
• Confirm it reads 1Rx4 and PC4-3200AA-R
• Make sure your server is a DDR4 Gen10 Plus model
• Avoid mixing with x8 modules or LRDIMMs

Buying P38454-B21 In The UK

We supply HPE memory to UK businesses, schools and IT resellers, and the delivery choices are shown at checkout. For help matching a kit, get in touch with your server model, serial number and the text on the labels of the modules you already have.

Frequently Asked Questions

Is P38454-B21 the same module as P39381-001 and P38520-1A1?

Yes. P38454-B21 is the option kit number, P39381-001 is the spare number and P38520-1A1 is the assembly number. They all describe the same 32GB single rank x4 DDR4-3200 registered module.

Can I fit this kit in an Intel based DL380 Gen10 Plus?

HPE QuickSpecs for the DL380 Gen10 Plus list P40007-B21 as the single rank 32GB kit rather than P38454-B21. This kit is listed for AMD based Gen10 Plus servers such as the DL385 Gen10 Plus, so check your QuickSpecs first.

Can I mix single rank and dual rank 32GB modules?

HPE does not allow x4 and x8 modules or RDIMMs and LRDIMMs to be mixed. For best results, use matching modules of the same rank across the server.

How do the New and Refurbished options differ?

New kits are unused, while Refurbished kits are previously used and priced lower. The condition and warranty for each are shown when you select the option.

Can you deliver P38454-B21 to an address in the UK?

Yes, we ship across the UK. Delivery options are listed at checkout.