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31EB ✓ 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 128GB DDR3 CDIMM (4U) Memory. Key specifications include Speed: DDR4-3200, Voltage: 1.2V, Capacity: 16GB, Form Factor: RDIMM. The unit ships in a 2U form factor suitable for standard rack-mount installations.

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→ 2U BAY→ 31EB
SPECIFICATIONS
SpeedDDR4-3200
Voltage1.2V
Capacity16GB
Form FactorRDIMM
COMPONENT DIAGRAM
ECC 128GB 2Rx4 PC3 — RDIMM IBM NOTCH ~133.35 mm DDR3 RDIMM | 128GB | — | PC3 Notch position = DDR3 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR3 RDIMM PN 31EB MFR IBM 128GB —
KEY FEATURES
•
2U Form Factor
•
DDR3 Interface
•
128GB Capacity
•
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

No verified substitutes available.

LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31EB?
31EB is a IBM 128GB DDR3 CDIMM (4U) Memory manufactured by IBM. It is classified as a MEMORY (RDIMM).
Is 31EB still available?
31EB is currently Unknown.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026