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J9P81AT — HP 4GB (1x4GB) DDR4-2133 MHz ECC Registered RAM

HPE · DIMM
PRODUCT OVERVIEW

J9P81AT: HP 4GB (1x4GB) DDR4-2133 MHz ECC Registered RAM.

Boost the capabilities of your HP Workstation with registered DDR4 memory from HP. Get high reliability and cost savings on high-capacity modules vs. unregistered memory.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

SPECIFICATIONS
Part NumberJ9P81AT
ManufacturerHPE
InterfaceDDR4
Capacity4GB
Speed2133MHz
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COMPONENT DIAGRAM
ECC 4GB 2Rx4 PC4 2133MHz RDIMM HPE NOTCH ~133.35 mm DDR4 RDIMM | 4GB | 2133MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN J9P81AT MFR HPE 4GB 2133MHz
KEY FEATURES
•
DDR4 Interface
•
4GB Capacity
•
2133MHz 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
SUBSTITUTES & CROSS-REFERENCES 8
726717-B21CompatiblePARTNER
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel v3 - G9
compatible
774169-001CompatiblePARTNER
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel v3 - G9
compatible
752367-081CompatiblePARTNER
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel v3 - G9
compatible
752367-581CompatiblePARTNER
HP 4GB PC4-2133P-R ECC Reg Sr X8 Cas-15 Dimm - Intel - WS
compatible
790112-001CompatiblePARTNER
HP 4GB PC4-2133P-R ECC Reg Sr X8 Cas-15 Dimm - Intel - WS
compatible
807815-B21CompatiblePARTNER
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel v3 - Cloudline
compatible
LIFECYCLE
Manufacturer release date (catalog record)2014-10-13
THIS PART SUBSTITUTES FOR 8
J9P81AASUBSTITUTE
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel - WS
HP
726717-B21SUBSTITUTE
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel - WS
HP
752367-081SUBSTITUTE
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel - WS
HP
752367-581SUBSTITUTE
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel - WS
HP
774169-001SUBSTITUTE
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel - WS
HP
790112-001SUBSTITUTE
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel - WS
HP
807815-B21SUBSTITUTE
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel - WS
HP
817544-081SUBSTITUTE
HP 4Gb PC4-2133P-R ECC REG SR x8 CAS-15 DIMM - Intel - WS
HP
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FREQUENTLY ASKED QUESTIONS
What is J9P81AT?
J9P81AT is a HP 4GB (1x4GB) DDR4-2133 MHz ECC Registered RAM manufactured by HPE.
What parts can replace J9P81AT?
There are 8 known substitutes for J9P81AT: 726717-B21, 774169-001, 752367-081 and 5 more. Substitute compatibility should be verified for your specific system.
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PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.