HPE Gen10 Memory (1st Gen CPU)
HPE 32GB (1x32GB) Dual Rank x4 DDR4-2666 CAS-19-19-19 Registered Smart Memory Kit
Fits 9 HPE ProLiant server models. See the list
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Part number cross-reference
- Part number
- 815100-B21
Overview
This item, 815100-B21, is the HPE option part number for the product described as 32GB (1x32GB) Dual Rank x4 DDR4-2666 CAS-19-19-19 Registered Smart Memory Kit. Further details below.
Expand your HPE ProLiant Gen10 server with the 815100-B21 32GB (1x32GB) Dual Rank x4 DDR4-2666 Registered Smart Memory Kit. This 288-pin DDR4 SDRAM DIMM runs at 2666 MHz (PC4-21300) with CAS Latency CL19 (19-19-19) timings and a low 1.2V supply voltage, delivering high-capacity performance for virtualization, databases, and demanding workloads without driving up power draw. Registered (RDIMM) architecture and ECC data integrity checking help keep memory-intensive applications stable and error-free around the clock.
As genuine HPE Smart Memory, the 815100-B21 module is qualified for HPE Gen10 platforms with 1st generation CPUs, including the BL460c, DL360, DL380, DL560, DL580, ML110, ML350, XL170r, and XL190r Gen10 servers. With a 4096 x 72 module configuration and x4 chip organization, it's an easy, drop-in way to scale capacity to 32GB per slot. Global One Technology backs every module with quantity discounts and fast shipping.
HPE Option Part #: 815100-B21
HPE Spare Part #: 850881-001
HPE Assembly Part #: 840758-091
PRODUCT SPECIFICATIONS FOR 815100-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
- Module Configuration: 4096 x 72
- Chips Organization: X4
- Memory Speed: 2666 megahertz
- Memory Specification Compliance: PC4-21300
- Supply Voltage: 1.2 volt
- CAS Latency: CL19
- Latency Timings: 19-19-19
- RAM Features: Dual Rank
RESOURCES FOR 815100-B21
Quickspecs for 815100-B21COMPATIBLE WITH:
PROLIANT BL SERIES
PROLIANT DL SERIES
PROLIANT ML SERIES
PROLIANT XL SERIES
** This list may not be complete. Contact us via Live Chat if you have any questions about compatibility.
FREQUENTLY ASKED QUESTIONS FOR 815100-B21:
- Which servers is the 815100-B21 memory module compatible with?
The 815100-B21 32GB DDR4-2666 Registered Smart Memory module is compatible with HPE Gen10 servers using 1st generation CPUs, including the BL460c Gen10, DL360 Gen10, DL380 Gen10, DL560 Gen10, DL580 Gen10, ML110 Gen10, ML350 Gen10, XL170r Gen10, and XL190r Gen10. - Is the 815100-B21 registered ECC memory?
Yes. The 815100-B21 is a Registered (RDIMM) DDR4 module with ECC data integrity checking, which helps detect and correct memory errors for greater stability in mission-critical server workloads. - What are the speed and latency specs of the 815100-B21?
The 815100-B21 is a 32GB dual rank x4 DDR4 SDRAM DIMM rated at 2666 MHz (PC4-21300) with CAS latency CL19 and 19-19-19 timings, operating at 1.2V in a 288-pin DIMM form factor.
HPE PARTSURFER INFO FOR 815100-B21
| Spare PN | Description | |
|---|---|---|
 | 850881-001 | 32GB PC4-2666V-R, registered Synchronous Dynamic Random Access Memory (SDRAM) 2Gx4, operated in a Dual Data Rate (DDR4) mode, packaged in a dual in-line memory module organized as 4Gx72 ; |
Last Updated: 2026-10-22
Other sizes in this family
| Part number | Capacity | Type | Rank | Price | Availability |
|---|
Working out how many you need? Each server's memory page counts the modules for the capacity you want: see Compatible servers.
Specifications
Compatible servers
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Part numbers
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Questions about 815100-B21
Warranty and returns
5-year replacement warranty
Covered against hardware failure for 5 years from the date of purchase. While HPE's own warranty runs, HPE replaces a failed part through the HPE Enterprise Support Center. After that, send it back to us for a working replacement; you ship it to us and we pay Ground or Economy shipping on the replacement.
Ordered the wrong part?
It is the customer's responsibility to verify compatibility before ordering. A part ordered by mistake can be returned for a refund, less a 25% restocking fee, within 5 business days of receipt. Freight is not refunded, and factory-sealed items can only be returned unopened. Check Compatible servers before you order.
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Reviews of this part
9 reviews
Wonderful
“My purchase arrived earlier than expected, and I'm thrilled with the speedy delivery.”
Good website
“The website's design is top-notch, and the user interface is smooth. It's evident that they put effort into making it customer-friendly.”
5 stars!
“The knowledgeable staff provided helpful recommendations, and I'm happy with the products I chose.”
5 stars
“I want to express my gratitude for the outstanding customer support. They made me feel valued and heard.”
The best
“The pricing was competitive and the service was A+++”
Favorite supplier
“Global One Tech always has what we need in stock at a good price. Fast shipping!”
No problems
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Very good
“My purchase arrived faster than I expected, and I'm impressed by the efficiency of the shipping process. Kudos to the team for their promptness!”
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815100-B21 HPE 32GB (1x32GB) Dual Rank x4 DDR4-2666 CAS-19-19-19 Registered Smart Memory Kit
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