850880-001 is the HPE spare part number for 16GB (1x16GB) Single Rank x4 DDR4-2666 CAS-19-19-19 Registered Smart Memory Kit. This is the number HPE service documentation, iLO event logs, and the module's own label use to identify a failed DIMM in the field. The module is a 288-pin DDR4 registered DIMM with ECC, single rank, x4 chip organization, running at 2666 MHz to PC4-21300 at 1.2 V with CL19 timings of 19-19-19. It is supported in Gen10 servers with first-generation processors, including DL360, DL380, DL560, DL580, BL460c, ML110, ML350, XL170r, and XL190r. Replace the failed DIMM in the same slot to preserve the existing population rules.
HPE Option Part #: 815098-B21
HPE Spare Part #: 850880-001
HPE Assembly Part #: 840757-091
PRODUCT SPECIFICATIONS FOR 850880-001:
- Brand: HPE
- Product Line: HPE, HPE SmartMemory
- Type: DRAM
- Product Type: Memory module
- Form Factor: DIMM 288-pin
- Technology: DDR4 SDRAM
- Storage Capacity: 16 GB
- Registered or Buffered: Registered
- Data Integrity Check: ECC
- Module Configuration: 2048 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: Single Rank
RESOURCES FOR 850880-001 (815098-B21)
Quickspecs for 815098-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 ABOUT 850880-001
What is the difference between 850880-001 and 815098-B21?
They are the same physical memory module under two different HPE numbering schemes. 850880-001, the number on this page, is the spare part number, used in service documentation and printed on the module itself for replacement identification. 815098-B21 is the option kit number, used when the memory is ordered as a configurable or add-on purchase. This family also has one assembly revision, listed in the cross-reference block on this page. An assembly part number identifies a manufacturing-level build revision of the same module.
Will this module work alongside the DIMMs already installed in my server?
It matches the electrical and timing profile of the original: 16 GB, single rank, x4 organization, DDR4-2666 (PC4-21300), registered with ECC, CL19 at 19-19-19, 1.2 V, in a 288-pin DIMM form factor. Mixing rules on HPE Gen10 platforms depend on the full population in the server, so install the replacement in the slot the failed DIMM occupied and keep channel population consistent with the original configuration.
Which servers accept this memory?
Supported platforms are HPE Gen10 servers with first-generation processors: BL460c Gen10, DL360 Gen10, DL380 Gen10, DL560 Gen10, DL580 Gen10, ML110 Gen10, ML350 Gen10, XL170r Gen10, and XL190r Gen10. The 2666 MHz rating is the module's maximum; the operating speed in a given system is set by the installed processor and the total DIMM population, and the module will clock down accordingly.
What does the kit contain?
The product is a 1x16GB kit, so one 16 GB DDR4-2666 registered DIMM. It is a single-rank module with x4 chip organization and a 2048 x 72 module configuration, the 72-bit width reflecting ECC support. Nothing else is required to install it beyond standard antistatic handling and access to the DIMM slot the failed module occupied.
Is this genuine HPE SmartMemory?
Yes. The module is HPE SmartMemory, which HPE identifies and validates through the server's memory subsystem. That identification is what allows the server firmware and iLO to report the module by HPE part number and to log rank, speed, and correctable error data against it. Third-party DDR4-2666 registered DIMMs of matching specification do not carry the SmartMemory identifier.
HPE PARTSURFER INFO FOR 850880-001 (815098-B21)
| Spare PN | Description | |
|---|---|---|
 | 850880-001 | 16GB 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 2Gx72 ; |
Last Updated: 2026-09-17
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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
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