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Technical Data Sheet
PartsTable / MEMORY / 647893-B21
647893-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 4GB (1x4GB) 1RX4 PC3L-10600R-9 DDR3-1333MHZ MEMORY

HP 4GB (1x4GB) 1RX4 PC3L-10600R-9 DDR3-1333MHZ MEMORY. Key specifications include Rank: Dual Rank (2R), Speed: DDR4-2666, Voltage: 1.2V, Capacity: 16GB, Form Factor: RDIMM, Organization: x4. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-613-1444, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MEMORY→ RDIMM→ 647893-B21
NSN: 7025-01-613-1444
FSC: 7025
CAGE: K3464 — HEWLETT-PACKARD LTD (GBR)
SPECIFICATIONS
RankDual Rank (2R)
SpeedDDR4-2666
Voltage1.2V
Capacity16GB
Form FactorRDIMM
Organizationx4
NSN7025-01-613-1444
COMPONENT DIAGRAM
ECC 4GB 2Rx4 PC3 1333MHz RDIMM HP NOTCH ~133.35 mm DDR3 RDIMM | 4GB | 1333MHz | PC3 Notch position = DDR3 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR3 RDIMM PN 647893-B21 MFR HP 4GB 1333MHz
KEY FEATURES
•
DDR3 Interface
•
4GB Capacity
•
1333MHz Speed
•
DDR3 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
664688-001Compatible
HP 4Gb PC3L-10600R 1333Mhz ECC REG SR x4 CAS-9 LV DIMM - Intel v1 - G8
compatible
647647-071Compatible
HP 4Gb PC3L-10600R 1333Mhz ECC REG SR x4 CAS-9 LV DIMM - Intel v1 - G8
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 2
647647-071SUBSTITUTE
HP 4Gb PC3L-10600R 1333Mhz ECC REG SR x4 CAS-9 LV DIMM - Intel v1 - G8
HPE
664688-001SUBSTITUTE
HP 4Gb PC3L-10600R 1333Mhz ECC REG SR x4 CAS-9 LV DIMM - Intel v1 - G8
HPE
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FREQUENTLY ASKED QUESTIONS
What is 647893-B21?
647893-B21 is a HP 4GB (1x4gb) 1Rx4 Pc3l-10600r-9 DDR3-1333MHZ Memory manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 647893-B21?
There are 2 known substitutes for 647893-B21: 664688-001, 647647-071. Substitute compatibility should be verified for your specific system.
What is the NSN for 647893-B21?
647893-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-613-1444. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026