HPE 16GB (1x16GB) Single Rank x4 DDR4-2666 CAS-19-19-19 Registered Smart Memory Kit
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Part number cross-reference
- Part number
- 840757-191
Overview
This item, 840757-191, is the HPE assembly number for the product described as 16GB (1x16GB) Single Rank x4 DDR4-2666 CAS-19-19-19 Registered Smart Memory Kit. Further details below.
Enhance the performance of your Gen10 server with this 16GB DDR4-2666 Registered Smart Memory Kit. This memory module provides a significant boost in speed and responsiveness, improving overall system performance for various applications. Operating at a speed of 2666 MHz with CAS Latency of 19-19-19, this memory delivers reliable and efficient data processing.
This 16GB memory module is specifically designed for seamless integration with Gen10 servers. Featuring ECC data integrity and a single-rank configuration, this kit ensures stable and dependable operation. Compatible servers include, but are not limited to, Gen10 servers. Upgrade your server's memory and experience improved performance today.
HPE Option Part #: 838081-B21
HPE Spare Part #: 868842-001
HPE Assembly Part #: 840757-191
PRODUCT SPECIFICATIONS FOR 840757-191:
- Capacity: 16 GB
- Upgrade Type: System specific
- OEM Manufacturer Equivalent Part Number: HP 838081-B21, HP 868842-001
- Type: DRAM memory module
- Technology: DDR4 SDRAM
- Form Factor: DIMM 288-pin
- Speed: 2666 MHz (PC4-21300)
- Latency Timings: CL19 (19-19-19)
- Data Integrity Check: ECC
- Features: Single Rank, registered
- Module Configuration: 2048 x 72
- Chips Organization: X4
- Voltage: 1.2 V
COMPATIBLE WITH:
OTHER HPE MACHINES
** This list may not be complete. Contact us via Live Chat if you have any questions about compatibility.
HPE PARTSURFER INFO FOR 840757-191 (838081-B21)
| Spare PN | Description | |
|---|---|---|
 | 868842-001 | 16GB PC4-2666V-R, synchronous dynamic random access memory (SDRAM),dual data rate(DDR4) mode, dual in-line memory module (DIMM), organized as 2Gx72 |
Last Updated: 2026-02-01
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
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Part numbers
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Questions about 840757-191
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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840757-191 HPE 16GB (1x16GB) Single Rank x4 DDR4-2666 CAS-19-19-19 Registered Smart Memory Kit
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