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815098-B21 ✓ Verified by PartsTable
HP · MEMORY · RDIMM
WHAT YOU NEED TO KNOW
Memory is a hot market right now. DDR5 and DDR4 are extremely volatile with data centers driving availability to extreme lows. Always validate machine type and model. Remember: all RAM is Hynix, Samsung, or Micron underneath OEM labels — use that to find alternatives. Key checks: Check OEM alternatives — all RAM is Hynix/Samsung/Micron underneath. Double-check what you're quoting in volatile market.
HOT market — DDR5/DDR4 extremely volatile
PRODUCT OVERVIEW
HP 16GB (1*16GB) 1RX4 PC4-21300V-R DDR4-2666MHZ MEMORY

HP 16GB (1*16GB) 1RX4 PC4-21300V-R DDR4-2666MHZ MEMORY. Key specifications include Speed: DDR4-2666, Voltage: 1.2V, Capacity: 16GB, Form Factor: RDIMM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-685-7402, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MEMORY→ RDIMM→ 815098-B21
NSN: 7025-01-685-7402
FSC: 7025
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)
SPECIFICATIONS
SpeedDDR4-2666
Voltage1.2V
Capacity16GB
Form FactorRDIMM
NSN7025-01-685-7402
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 815098-B21 MFR HP 16GB 2666MHz
KEY FEATURES
•
DDR4 Interface
•
16GB Capacity
•
2666MHz Speed
•
DDR4 Memory
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
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYSMART MEMORY SENSITIVE CIRCUIT CARD
PART NAME ASSIGNED BY CONTROLLING AGENCYSMART MEMORY SENSITIVE CIRCUIT CARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
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
815098-X21Compatible
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 19
881067-B21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
L09275-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
L09285-850SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
L12128-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
L42291-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
P14423-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
1XD85AASUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
1XD85ATSUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
815098-H21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
815098-K21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
815098-X21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
840757-091SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
840757-09SSUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
850880-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
864707-591SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
867855-B21SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
872837-091SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
872837-C91SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
872970-001SUBSTITUTE
HP 16Gb PC4-2666V-R ECC REG SR x4 CAS-19 DIMM - Intel - G10
HPE
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FREQUENTLY ASKED QUESTIONS
What is 815098-B21?
815098-B21 is a HP 16GB (1x16gb) 1Rx4 Pc4-21300V-R DDR4-2666MHZ Memory manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 815098-B21?
There are 12 known substitutes for 815098-B21: 850880-001, 1XD85AA, 1XD85AT and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 815098-B21?
815098-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-685-7402. This indicates validated use in U.S. government and defense supply chains.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026