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766989-B21 — Memory Specs & Substitutes

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HPE · 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 PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 - G8. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
766989-B21
SPECIFICATIONS
Part Number766989-B21
ManufacturerHPE
Capacity16GB
Speed1866MHz
COMPONENT DIAGRAM
ECC 16GB 2Rx4 PC4 1866MHz RDIMM HPE NOTCH ~133.35 mm DDR4 RDIMM | 16GB | 1866MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 766989-B21 MFR HPE 16GB 1866MHz
KEY FEATURES
•
16GB Capacity
•
1866MHz Speed
•
Generation 8 Platform
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 4
708641-B21Compatible
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 - G8
compatible
715274-001Compatible
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 - G8
compatible
712383-081Compatible
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 - G8
compatible
712383-08HCompatible
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 - G8
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 7
E2Q95AASUBSTITUTE
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 for DL380z G8
HPE
708641-B21SUBSTITUTE
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 for DL380z G8
HPE
712383-081SUBSTITUTE
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 for DL380z G8
HPE
712383-08HSUBSTITUTE
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 for DL380z G8
HPE
712383-581SUBSTITUTE
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 for DL380z G8
HPE
715274-001SUBSTITUTE
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 for DL380z G8
HPE
733482-001SUBSTITUTE
HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 for DL380z G8
HPE
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FREQUENTLY ASKED QUESTIONS
What is 766989-B21?
766989-B21 is a HP 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 DIMM - Intel v2 - G8 manufactured by HPE.
What parts can replace 766989-B21?
There are 4 known substitutes for 766989-B21: 708641-B21, 715274-001, 712383-081 and 1 more. Substitute compatibility should be verified for your specific system.
Is 766989-B21 still available?
766989-B21 is currently Unknown.
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Last verified: September 2026