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Technical Data Sheet
PartsTable / MEMORY / 7956057-05
7956057-05 ✓ Verified by PartsTable
— · 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 4GB (2 x 2GB) PC2-4200 DDR2 Memory Kit. Key specifications include shape: RECTANGULAR, material: ALUMINUM ALLOY AND RUBBER SYNTHETIC AND SILICONE, thickness: 0.188 INCHES NOMINAL IN, overall_width: 0.188 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-00-760-7406, 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→ 7956057-05
NSN: 5999-00-760-7406
FSC: 5999
CAGE: 90536 — LOCKHEED MARTIN CORP DBA LOCKHEED MARTIN DIV MST - EAGAN (USA)
SPECIFICATIONS
shapeRECTANGULAR
materialALUMINUM ALLOY AND RUBBER SYNTHETIC AND SILICONE
thickness0.188 INCHES NOMINAL IN
overall_width0.188 INCHES NOMINAL IN
NSN5999-00-760-7406
COMPONENT DIAGRAM
ECC 4GB 2Rx4 PC4 — RDIMM OEM NOTCH ~133.35 mm DDR4 RDIMM | 4GB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 7956057-05 MFR OEM 4GB —
KEY FEATURES
•
4GB Capacity
•
SHAPE: RECTANGULAR
•
MATERIAL: ALUMINUM ALLOY AND RUBBER SYNTHETIC AND SILICONE
•
THICKNESS: 0.188 INCHES NOMINAL IN
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)
SHAPERECTANGULAR
MATERIALALUMINUM ALLOY AND RUBBER SYNTHETIC AND SILICONE
THICKNESS0.188 INCHES NOMINAL IN
OVERALL WIDTH0.188 INCHES NOMINAL IN
SHAPERECTANGULAR
MATERIALALUMINUM ALLOY AND RUBBER SYNTHETIC AND SILICONE
THICKNESS0.188 INCHES NOMINAL IN
OVERALL WIDTH0.188 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
1313Upgraded Successor
successor cross-reference
successor
14071Upgraded Successor
successor cross-reference
successor
DS-920870Interchangeable
interchangeable cross-reference
interchangeable
MS21318-7Interchangeable
interchangeable cross-reference
interchangeable
371883R91Interchangeable
interchangeable cross-reference
interchangeable
M12610Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7956057-05?
7956057-05 is a IBM 4GB (2 x 2GB) PC2-4200 DDR2 Memory Kit. It is classified as a MEMORY (RDIMM).
What parts can replace 7956057-05?
There are 13 known substitutes for 7956057-05: 1313, 14071, DS-920870 and 10 more. Substitute compatibility should be verified for your specific system.
Is 7956057-05 still available?
7956057-05 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026