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815100-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 32GB (1x32GB) 2RX4 PC4-21300V-R DDR4-2666MHZ RDIMM

A Hewlett Packard Enterprise equivalent 32 GB Dual rank- registered ECC DDR4 SDRAM - DIMM 288-pin 2666 MHz (PC4-21300) from Hypertec NOTE: This memory meets the memory specification requirements for reliable operation within a HP Generation 8 (or 9) server- but is not SmartMemory and does not identify as SmartMemory when installed or deliver SmartMemory specific features. from Hypertec This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-671-8231, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
MEMORY RDIMM 815100-B21
NSN: 5998-01-671-8231
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: K3464 — HEWLETT-PACKARD LTD (GBR)
SPECIFICATIONS
SpeedDDR4-2666
Voltage1.2V
Capacity32GB
Form FactorRDIMM
NSN5998-01-671-8231
COMPONENT DIAGRAM
ECC 32GB 2Rx4 PC4 2666MHz RDIMM HP NOTCH ~133.35 mm DDR4 RDIMM | 32GB | 2666MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 815100-B21 MFR HP 32GB 2666MHz
KEY FEATURES
DDR4 Interface
32GB Capacity
2666MHz Speed
DDR4 RDIMM
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 AGENCYHPE 32 GB (1X32GB) DUAL RANK X4 DDR4-2666 CAS-19-19-19 REGISTERED SMART MEMORY KIT GB
PART NAME ASSIGNED BY CONTROLLING AGENCYHPE 32 GB (1X32GB) DUAL RANK X4 DDR4-2666 CAS-19-19-19 REGISTERED SMART MEMORY KIT GB
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
1XD86AACompatible
HP 32GB PC4-2666V-R ECC Reg Dr X4 Cas-19 Dimm - Intel - WS
compatible
1XD86ATCompatible
HP 32GB PC4-2666V-R ECC Reg Dr X4 Cas-19 Dimm - Intel - WS
compatible
815100-H21Compatible
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
compatible
815100-K21Compatible
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
compatible
815100-X21Compatible
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
compatible
840758-091Compatible
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 20
880841-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
882361-091SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
882448-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
L09276-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
L09286-850SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
L12129-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
L42293-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P00602-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P02892-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P04177-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P05590-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P05590-X21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P06185-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P13627-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P18445-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P26140-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
P28221-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
Q1V92ASUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
Q2D32ASUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
1XD86AASUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
HPE
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FREQUENTLY ASKED QUESTIONS
What is 815100-B21?
815100-B21 is a HP 32GB (1x32gb) 2Rx4 Pc4-21300V-R DDR4-2666MHZ RDIMM manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 815100-B21?
There are 12 known substitutes for 815100-B21: 1XD86AA, 1XD86AT, 815100-H21 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 815100-B21?
815100-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-671-8231. This indicates validated use in U.S. government and defense supply chains.
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