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39M5785 ✓ Verified by PartsTable
IBM · 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
IBM 2GB 2X1GB PC2-5300F ECC KIT

2GB (2x1GB) PC2-5300, CL5, ECC, DDR2, Chipkill FB-DIMM, 667MHz.<br><br>The new IBM memory upgrade offerings let you upgrade standard system memory capacity, helping to improve overall system performance. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-565-4063, 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→ 39M5785
NSN: 7025-01-565-4063
FSC: 7025
CAGE: 1U0E6 — IBM (USA)
SPECIFICATIONS
Part Number39M5785
ManufacturerIBM
Capacity2GB
NSN7025-01-565-4063
COMPONENT DIAGRAM
ECC 2GB 2Rx4 PC4 — RDIMM IBM NOTCH ~133.35 mm DDR4 RDIMM | 2GB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 39M5785 MFR IBM 2GB —
KEY FEATURES
•
2GB Capacity
•
DRIVE SIZE: 5.25
•
DATA STORAGE CAPACITY: 2.00 GIGABYTES
•
UNIT DESIGN: INTERNAL
•
DESIGN TYPE: HARD DISK
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)
DRIVE SIZE5.25
DATA STORAGE CAPACITY2.00 GIGABYTES
OVERALL WIDTH1.191 INCHES NOMINAL IN
END ITEM IDENTIFICATIONSERVER 7979A2G
UNIT DESIGNINTERNAL
SPECIAL FEATURESHIGH QUALITY DDR2-677 SERVER MEMORY UPGRADE FOR IBM SYSTEM X3400, X3450,X3500,X3550 AND X3650 SERVERS
DESIGN TYPEHARD DISK
OVERALL HEIGHT5.250 INCHES NOMINAL IN
DRIVE QUANTITY2
DRIVE SIZE5.25
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
38L5903Compatible
IBM 1GB Pc2-5300f 667MHZ ECC Fbd Dr X8 Cl5 Dimm - P/n
compatible
39M5784Compatible
IBM 1GB Pc2-5300f 667MHZ ECC Fbd Dr X8 Cl5 Dimm - Fru
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 2
38L5903SUBSTITUTE
IBM 2Gb PC2-5300F 667Mhz ECC FBD DR x8 CL5 (2x1Gb) Memory Kit for M1/HS21 - Option
IBM
39M5784SUBSTITUTE
IBM 2Gb PC2-5300F 667Mhz ECC FBD DR x8 CL5 (2x1Gb) Memory Kit for M1/HS21 - Option
IBM
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FREQUENTLY ASKED QUESTIONS
What is 39M5785?
39M5785 is a IBM 2GB 2x1gb Pc2-5300f ECC Kit manufactured by IBM. It is classified as a MEMORY (RDIMM).
What parts can replace 39M5785?
There are 2 known substitutes for 39M5785: 38L5903, 39M5784. Substitute compatibility should be verified for your specific system.
What is the NSN for 39M5785?
39M5785 is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-565-4063. 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.
Last verified: July 2026