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Technical Data Sheet

726718-B21 — Memory Specs & Substitutes

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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 8GB (1x8GB) 1RX4 PC4-17000P-R DDR4-2133MHZ RDIMM

When you choose HP SmartMemory you get the same high quality, reliability, and confidence that come with your HP ProLiant Gen9 Server series. DRAM quality and reliability are more important now than ever. Industry trends such as server virtualization, cloud computing, the use of large database applications and high-performance computing have all increased the need for higher capacity memory with greater reliability and uptime.

HP SmartMemory is unique technology was introduced in ProLiant Gen8 Servers and in ProLiant Gen9 Servers it unlocks certain features available only with HP Qualified Server memory. HP SmartMemory enables ProLiant Gen9 systems to reliably identify and verify whether installed memory has passed the rigorous HP qualification and testing processes. And because the memory is authenticated, extended memory performance features can be enabled through the system ROM.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-641-3867, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
MEMORY RDIMM 726718-B21
NSN: 5998-01-641-3867
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)
SPECIFICATIONS
RankSingle Rank (1R)
SpeedDDR4-2666
Voltage1.2V
Capacity16GB
Form FactorRDIMM
Organizationx4
NSN5998-01-641-3867
COMPONENT DIAGRAM
ECC 8GB 2Rx4 PC4 2133MHz RDIMM HP NOTCH ~133.35 mm DDR4 RDIMM | 8GB | 2133MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 726718-B21 MFR HP 8GB 2133MHz
KEY FEATURES
DDR4 Interface
8GB Capacity
2133MHz 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 AGENCYRAM MODULE
END ITEM IDENTIFICATIONCOMPUTER SYSTEM
PART NAME ASSIGNED BY CONTROLLING AGENCYRAM MODULE
END ITEM IDENTIFICATIONCOMPUTER SYSTEM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
726718-B21Interchangeable
HP 8GB (1x8gb) 1Rx4 Pc4-17000p-R DDR4-2133MHZ RDIMM
interchangeable
752368-081Interchangeable
HP 8GB (1x8gb) 1Rx4 Pc4-17000p-R DDR4-2133MHZ RDIMM
interchangeable
774170-001Compatible
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
compatible
752368-08SCompatible
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
compatible
752368-281Compatible
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
compatible
752368-581Compatible
HP 8GB PC4-2133P-R ECC Reg Sr X4 Cas-15 Dimm - Intel - WS
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMATSourcing: other
THIS PART SUBSTITUTES FOR 20
J9P82AASUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
J9P82ATSUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
752368-081SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
752368-08SSUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
752368-281SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
752368-581SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
752368-M81SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
753220-201SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
753220-B21SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
774170-001SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
787864-B21SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
790109-001SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
803028-B21SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
803656-081SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
804843-001SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
807816-B21SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
817545-081SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
847830-B21SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
850084-001SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
857555-B21SUBSTITUTE
HP 8Gb PC4-2133P-R ECC REG SR x4 CAS-15 DIMM - Intel v3 - G9
HPE
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FREQUENTLY ASKED QUESTIONS
What is 726718-B21?
726718-B21 is a HP 8GB (1x8gb) 1Rx4 Pc4-17000p-R DDR4-2133MHZ RDIMM manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 726718-B21?
There are 13 known substitutes for 726718-B21: 726718-B21, 752368-081, 774170-001 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 726718-B21?
726718-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-641-3867. This indicates validated use in U.S. government and defense supply chains.
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