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P43328-B21: HPE 32GB (1x32GB) Single Rank x4 DDR5-4800 CAS-40-39-39 EC8 Registered Smart Memory Kit

HPE P43328-B21 Memory4800 MT/s
HPEMemory

Also listed as: P46628-001, P43018-001, M321R4GA3BB0-CQK, HMCG88AGBRA181N · made by Samsung

The HPE P43328-B21 is a 32GB single-rank DDR5-4800 ECC registered SmartMemory DIMM kit engineered for HPE ProLiant Gen11 enterprise servers. Operating at 4800 MT/s at 1.1V, its single-rank 1Rx4 organization provides low capacitive trace loading across the 8-channel or 12-channel memory architectures of modern processors, supporting high throughput with low latency.

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Specifications

Part numberP43328-B21
BrandHPE
Made bySamsung
TypeMemory
Other numbersP46628-001, P43018-001, M321R4GA3BB0-CQK, HMCG88AGBRA181N
Statuscurrent
Capacity32GB
TypeDDR5-4800 Registered DIMM (RDIMM)
Speed4800 MT/s (PC5-38400)
Voltage1.1V
RankSingle Rank (1Rx4)
Cas latency40-39-39
Generation fitProLiant Gen11 servers with 4th Gen Intel Xeon Scalable

About the P43328-B21

P43328-B21 delivers 32GB of high-density single-rank DDR5-4800 registered ECC memory for HPE ProLiant Gen11 enterprise servers. Built using 16Gb monolithic DDR5 DRAM components, it enables system configurations up to 1TB per processor across eight memory channels while maintaining optimal signal integrity and energy efficiency through onboard PMIC voltage regulation.

Compatibility

Compatible with all HPE ProLiant Gen11 servers supporting DDR5 memory, including DL380 Gen11, DL360 Gen11, DL385 Gen11, DL325 Gen11, DL345 Gen11, DL365 Gen11, DL560 Gen11, ML350 Gen11, ML110 Gen11, and Synergy 480 Gen11. Physical keying is incompatible with Gen10 DDR4 sockets.

How to identify a genuine unit

288-pin DDR5 registered DIMM with center-mounted PMIC chip and Samsung/SK hynix DRAM packages. Label displays option part number P43328-B21, spare part number P46628-001, and assembly part number P43018-001 alongside the holographic genuine HPE seal.

Buying used

Verify that all 288 gold edge contacts are clean and unblemished. Check the onboard PMIC component for physical chips or signs of thermal distress. Ensure that the module is recognized in HPE iLO 6 with valid serial number, correct CAS latency timings, and zero correctable ECC events.

Reference prices (last 12 months, updated 2026-10-27)

Used: USD 125 (1 sighting, Oct 2026)

All sightings
SellerConditionPriceNoteSeen
ebay.comusedUSD 125Tested working HPE 32GB 1Rx4 DDR5-4800 SmartMemory RDIMM2026-10-27

Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.

Fits these models

Check compatibility with HPE

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that HPE has tested with the HPE P43328-B21.

Equivalent part numbers

FAQ

Why is 1Rx4 preferred in multi-socket Gen11 deployments?

Single rank 1Rx4 DIMMs minimize the electrical load on the memory bus, allowing servers to maintain peak 4800 MT/s clock speeds even when fully populated across multiple memory channels.

How does HPE SmartMemory benefit Gen11 servers?

HPE SmartMemory enables advanced memory error recovery, telemetry tracking in iLO 6, and verifies authentic certified silicon, preventing spurious memory training failures.

Buying or selling P43328-B21?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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