HPE Gen10 Memory (1st Gen CPU)
HPE 128GB (1x128GB) Octal Rank x4 DDR4-2666 CAS-22-19-19 3DS Load Reduced Smart Memory Kit
Fits 2 HPE ProLiant server models. See the list
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Part number cross-reference
- Part number
- 838087-B21
Overview
This item, 838087-B21, is the HPE option part number for the product described as 128GB (1x128GB) Octal Rank x4 DDR4-2666 CAS-22-19-19 3DS Load Reduced Smart Memory Kit. Further details below.
Maximize your server's memory capacity and performance with this 128GB HPE DDR4-2666 Load Reduced DIMM (LRDIMM). This high-density memory module is designed to handle demanding workloads and complex applications, providing increased memory capacity without sacrificing speed.
Featuring an octal-rank configuration and 3DS technology, this LRDIMM delivers exceptional performance and efficiency. Operating at 2666 MHz with ECC data integrity, this item ensures reliable data handling. It's compatible with Gen10 servers; the list of compatible machines includes but may not be limited to the models provided. Upgrade your server's memory with this 128GB module for enhanced responsiveness and overall system performance.
HPE Option Part #: 838087-B21
HPE Spare Part #: 868845-001
HPE Assembly Part #: 840760-191
Specifications:
- Capacity: 128 GB
- Upgrade Type: System specific
- OEM Manufacturer Equivalent Part Number: HP 838087-B21, HP 868845-001
- Type: DRAM memory module
- Technology: DDR4 SDRAM
- Form Factor: LRDIMM 288-pin
- Speed: 2666 MHz (PC4-21300)
- Latency Timings: CL19 (19-19-19)
- Data Integrity Check: ECC
- Features: Octal Rank, 3DS Load-Reduced
- Module Configuration: 16384 x 72
- Chips Organization: X4
- Voltage: 1.2 V
✅ Gen10 Servers
✅ and possibly others
Contact us via Live Chat if you have any questions about compatibility.
Last Updated: 2026-06-25
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
Each server opens that model's memory page, with its slot rules and a kit picker.
Part numbers
Every number below identifies this same part. Match any of them to the label on the part you are replacing.
Questions about 838087-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.
Start a return or claim
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838087-B21 HPE 128GB (1x128GB) Octal Rank x4 DDR4-2666 CAS-22-19-19 3DS Load Reduced Smart Memory Kit
Filling a whole server?
Each server's memory page works out how many modules a capacity takes and where they go. For a full bill of materials, send it with your server model and we reply with pricing and availability within 24 hours.
