805351-B21 is the HPE option part number for 32GB (1 x 32GB) Dual Rank x4 DDR4-2400 CAS-17-17-17 Registered Memory Kit. It is a single 32GB DDR4 SDRAM registered DIMM in the 288-pin form factor, rated at 2400 MHz to the PC4-19200 specification with CAS latency CL17 and 17-17-17 timings. The module is dual rank, uses x4 chip organization, operates at 1.2 V and carries ECC for data integrity checking. It is supported in HPE Gen9 servers configured with v4 processors, including the DL360 Gen9, DL380 Gen9, ML350 Gen9, BL460c Gen9 and XL170r Gen9. Order by this number when populating or expanding memory to a defined configuration.
HPE Option Part #: 805351-B21
HPE Spare Part #: 819412-001
HPE Assembly Part #: 809083-091
PRODUCT SPECIFICATIONS FOR 805351-B21:
- Type: DRAM
- Product Type: Memory module
- Form Factor: DIMM 288-pin
- Technology: DDR4 SDRAM
- Storage Capacity: 32 GB
- Registered or Buffered: Registered
- Data Integrity Check: ECC
- Chips Organization: X4
- Memory Speed: 2400 megahertz
- Memory Specification Compliance: PC4-19200
- Supply Voltage: 1.2 volt
- CAS Latency: CL17
- Latency Timings: 17-17-17
- RAM Features: Dual Rank
COMPATIBLE WITH:
PROLIANT BL SERIES
PROLIANT DL SERIES
PROLIANT ML SERIES
PROLIANT XL SERIES
PROLIANT WS SERIES
** This list may not be complete. Contact us via Live Chat if you have any questions about compatibility.
FREQUENTLY ASKED QUESTIONS ABOUT 805351-B21
What is the difference between 805351-B21 and 819412-001?
They are the same physical memory module identified for different ordering channels. 805351-B21, the subject of this page, is the HPE option part number used when ordering the module as a configurable or add-on item. 819412-001 is the spare part number, the identifier used for service replacement of an installed module. This family also includes one assembly revision, listed in the cross-reference block on this page. An assembly part number identifies the manufactured build revision of the module rather than a sales or service SKU.
Which servers accept this module?
805351-B21 is supported in HPE Gen9 servers fitted with v4 processors: BL460c Gen9, WS460c Gen9, DL60 Gen9, DL80 Gen9, DL120 Gen9, DL160 Gen9, DL180 Gen9, DL360 Gen9, DL380 Gen9, ML110 Gen9, ML150 Gen9, ML350 Gen9, XL170r Gen9 and XL190r Gen9. The v4 CPU qualifier matters, since the DDR4-2400 rating is tied to those processor generations in these platforms.
What are the electrical and timing specifications?
The module is DDR4 SDRAM running at 2400 MHz and conforming to the PC4-19200 specification. CAS latency is CL17 with 17-17-17 latency timings. Supply voltage is 1.2 V. It is a registered DIMM with ECC data integrity checking, uses x4 chip organization and is dual rank. The physical interface is a 288-pin DIMM edge connector.
What does dual rank x4 mean for configuration planning?
Dual rank means the module presents two ranks of DRAM to the memory controller, which affects how many DIMMs a channel can carry and the speed the channel will run. The x4 organization refers to the four-bit data width of each DRAM device on the module. Consult the memory population rules for your specific Gen9 server to determine slot loading and resulting operating speed.
Is this a single module or a multi-module kit?
805351-B21 covers a 32GB kit made up of one 32GB DIMM, expressed as 1 x 32GB. To reach a larger total capacity, order the quantity of modules required by your target configuration and populate the slots according to the population order defined for your server model. Mixing module types within a system should follow the platform's documented memory guidelines.
HPE PARTSURFER INFO FOR 805351-B21
| Spare PN | Description | |
|---|---|---|
 | 819412-001 | HPE SmartMemory 32GB, 2400MHz, PC4-2400T-R, DDR4, dual-rank x4, 1.20V, CAS-17-17-17, registered dual in-line memory module (RDIMM) |
Last Updated: 2026-07-26
- Trusted by thousands. Over 36,000 customers in 100+ countries trust Global One Technology to deliver mission-critical HP Enterprise hardware - including Fortune 500 businesses, schools, hospitals, and federal, state, and local government agencies.
- HPE is our specialty! We only sell genuine HP Enterprise parts.
- EASY ordering process. Purchase online now with credit card or PayPal!
- FAST shipping. Global One Technology ships orders received by 4 PM ET the same day and offers NEXT DAY delivery to US customers.
8 Reviews
This product is warrantied against hardware failure for a period of 5 Years from the date of purchase. Before making a purchase, please take a moment to review our return policy below.
Returns
It is the customer's responsibility to verify compatibility with their machine(s) before placing an order. If an item is ordered by mistake, it can be returned for refund, minus a 25% restocking fee, within 5 business days of receipt. The cost of freight is not refundable.
Please be aware that factory-sealed equipment can only be returned if it remains unopened.
Defective Products
If you have received a defective part and your machine is still within the HPE warranty period, please initiate a warranty exchange by visiting the HPE Enterprise Support Center. Be sure to have the serial numbers of the defective drive and your server/storage array handy.
In case your hardware becomes defective during the Global One warranty period, but the HPE warranty has expired, you can return the product to us for a working replacement. You are responsible for the shipment of returned merchandise. However, we will cover the expense of Ground /Economy shipment for the replacement item(s).
Requesting an RMA
To initiate a return or warranty claim, please complete and submit the RMA Request Form.
