PartsTable
Technical Data Sheet
815101-B21 ✓ Verified by PartsTable
HP · MEMORY · LRDIMM
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 64GB (1x64GB) 4RX4 PC4-21300V-L DDR4-2666MHZ LRDIMM

Has your server been configured with the memory it needs to perform as its role expands over time? HPE Server Memory is designed for SMB and enterprise customers with a significant need for performance and capacity along with a desire to manage total cost of ownership. HPE SmartMemory enables total server memory optimization, runs at top throughput speed and is among the most power-efficient memory available. In addition to performance and efficiency, HPE SmartMemory also delivers on reliability.

Only the highest-quality DRAM modules are selected from top suppliers. Now more than ever, DRAM quality is critical, as data center trends such as server virtualization, cloud computing, and the use of large database applications have increased the need for higher-capacity memory with greater up-time. HPE SmartMemory undergoes rigorous qualification and testing processes that unlock memory performance features available only with HPE servers.<br><br><b>High Performance</b><br>HPE DDR4 2666 MT/ This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-671-1697, indicating validated use in U.S.

government and defense logistics supply chains.

WHERE IT FITS
MEMORY LRDIMM 815101-B21
NSN: 5998-01-671-1697
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: K3464 — HEWLETT-PACKARD LTD (GBR)
SPECIFICATIONS
SpeedDDR4-2666
Voltage1.2V
Capacity64GB
Form FactorRDIMM
NSN5998-01-671-1697
COMPONENT DIAGRAM
ECC 64GB 2Rx4 PC4 2666MHz LRDIMM HP NOTCH ~133.35 mm DDR4 LRDIMM | 64GB | 2666MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 LRDIMM PN 815101-B21 MFR HP 64GB 2666MHz
KEY FEATURES
DDR4 Interface
64GB Capacity
2666MHz Speed
DDR4 LRDIMM
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)
END ITEM IDENTIFICATIONDL380G10 DBL
PART NAME ASSIGNED BY CONTROLLING AGENCYHPE 64GB (1X64GB) QUAD RANK X4 DDR4-2666 CAS-19-19-19 LOAD REDUCED SMART MEMORY KIT GB
END ITEM IDENTIFICATIONDL380G10 DBL
PART NAME ASSIGNED BY CONTROLLING AGENCYHPE 64GB (1X64GB) QUAD RANK X4 DDR4-2666 CAS-19-19-19 LOAD REDUCED SMART MEMORY KIT GB
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
850882-001Compatible
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
compatible
815101-H21Compatible
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
compatible
815101-K21Compatible
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
compatible
815101-X21Compatible
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
compatible
840759-091Compatible
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
compatible
840759-091UCompatible
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 18
880842-B21SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
882362-091SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
882449-001SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
HMAA8GL7AMR4N-VKSUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
P00603-001SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
P04178-001SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
P18446-B21SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
P28223-B21SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
Q1V93ASUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
Q2D33ASUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
815101-H21SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
815101-K21SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
815101-X21SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
840759-091SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
840759-091USUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
840759-691SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
840759-791SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
850882-001SUBSTITUTE
HP 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - Intel - G10
HPE
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FREQUENTLY ASKED QUESTIONS
What is 815101-B21?
815101-B21 is a HP 64GB (1x64gb) 4Rx4 Pc4-21300V-L DDR4-2666MHZ LRDIMM manufactured by HP. It is classified as a MEMORY (LRDIMM).
What parts can replace 815101-B21?
There are 12 known substitutes for 815101-B21: 850882-001, 815101-H21, 815101-K21 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 815101-B21?
815101-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-671-1697. This indicates validated use in U.S. government and defense supply chains.
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