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872837-C91 — Memory Specs & Substitutes

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HP · DIMM
WHAT YOU NEED TO KNOW
2Rx4 = Dual Rank ×4 chip width (standard server) RDIMM = Registered (servers) | LRDIMM = Load-Reduced (max density)
DDR3 ≠ DDR4 ≠ DDR5 — physically incompatible (notch position)
PRODUCT OVERVIEW

HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - WS. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
872837-C91
SPECIFICATIONS
Part Number872837-C91
ManufacturerHP
Capacity16GB
Speed2666MHz
COMPONENT DIAGRAM
ECC 16GB 2Rx4 PC4 2666MHz RDIMM HP NOTCH ~133.35 mm DDR4 RDIMM | 16GB | 2666MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 872837-C91 MFR HP 16GB 2666MHz
KEY FEATURES
•
16GB Capacity
•
2666MHz Speed
TYPICAL APPLICATIONS
  • Server memory expansion for virtualization workloads
  • Database performance optimization (in-memory computing)
  • VDI and remote desktop session hosting
  • High-performance computing (HPC) clusters
  • Mail server and collaboration platform scaling
  • Application server tier expansion
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
815098-B21Compatible
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
compatible
850880-001Compatible
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
compatible
1XD85AACompatible
HP 16GB PC4-2666V-R ECC Reg Sr X4 Cas-19 Dimm - Intel - WS
compatible
1XD85ATCompatible
HP 16GB PC4-2666V-R ECC Reg Sr X4 Cas-19 Dimm - Intel - WS
compatible
815098-H21Compatible
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
compatible
815098-K21Compatible
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 19
881067-B21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
L09275-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
L09285-850SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
L12128-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
L42291-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
P14423-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
1XD85AASUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
1XD85ATSUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
815098-B21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
815098-H21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
815098-K21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
815098-X21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
840757-091SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
840757-09SSUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
850880-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
864707-591SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
867855-B21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
872837-091SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
872970-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - Cloudline
HPE
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FREQUENTLY ASKED QUESTIONS
What is 872837-C91?
872837-C91 is a HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - WS manufactured by HP.
What parts can replace 872837-C91?
There are 12 known substitutes for 872837-C91: 815098-B21, 850880-001, 1XD85AA and 9 more. Substitute compatibility should be verified for your specific system.
Is 872837-C91 still available?
872837-C91 is currently Unknown.
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Last verified: September 2026