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46W0779 — Memory Specs & Substitutes

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: Double-check what you're quoting in volatile market.
HOT market — DDR5/DDR4 extremely volatile
PRODUCT OVERVIEW
16GB DDR3 DIMM

The 16GB DDR3 Dimm is a IBM memory module engineered for enterprise server and workstation platforms requiring validated, high-reliability memory. Key specifications include ECC: Yes, CAS latency: 13, Component for: PC/Server, Memory voltage: 1.5 V, Internal memory: 16 GB, Memory clock speed: 1866 MHz. 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→ 46W0779
SPECIFICATIONS
ECCYes
CAS latency13
Component forPC/Server
Memory voltage1.5 V
Internal memory16 GB
Memory clock speed1866 MHz
Memory form factor240-pin DIMM
Internal memory typeDDR3
Memory layout (modules x size)1 x 16 GB
BROWSE IBM MACHINES
160/320Gb Escon Tape Drive Int (Ts1130) 1600/3200Gb Lto Tape FC-8Gb Hh (Ts3100/Ts3200) 2145-Sv1 San Volume Controller 2147-Sa2 San Volume Controller 2500/6250Gb Lto Tape FC-8Gb (Ts3310) 2812 Xivg2 2Tb Data Module (Fc 1126) 2812 Xivg2 2Tb Interface Module (Fc 1125) 2812 Xivg2 2Tb Lv Cod Data Module (Fc 1117) 3.5Ghz Cpu 12C (Fc Epxh) Power8 4/24-Port FC-8Gb San Switch (San06B-R) 7042 Hmc 2.4Ghz/15Mb/6C (E5-2620V3) 8247-22L (S22L) Power8
All IBM machines and parts
COMPONENT DIAGRAM
ECC 16GB 2Rx4 PC3 — RDIMM IBM NOTCH ~133.35 mm DDR3 RDIMM | 16GB | — | PC3 Notch position = DDR3 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR3 RDIMM PN 46W0779 MFR IBM 16GB —
KEY FEATURES
•
Up to 16 GB
•
DDR3 Interface
•
16GB 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
SUBSTITUTES & CROSS-REFERENCES 1
46W0781CompatiblePARTNER
IBM 16GB Pc3-14900r 1866MHZ ECC Reg Dr X4 Cas-13 Dimm AMD - Fru
compatible
LIFECYCLE

No lifecycle data available.

THIS PART SUBSTITUTES FOR 1
46W0781SUBSTITUTE
IBM 16Gb PC3-14900R 1866Mhz ECC REG DR x4 CAS-13 (1x16Gb) Memory Kit for x3755 M3 - AMD - Option
IBM
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FREQUENTLY ASKED QUESTIONS
What is 46W0779?
46W0779 is a 16GB DDR3 Dimm manufactured by IBM. It is classified as a MEMORY (RDIMM).
What parts can replace 46W0779?
There is 1 known substitute for 46W0779: 46W0781. Substitute compatibility should be verified for your specific system.
Is 46W0779 still available?
46W0779 is currently Unknown.
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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.