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78P4197 — 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

IBM 16GB DDR4 2666Mhz RDIMM Memory P9. 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→ 78P4197
SPECIFICATIONS
Part Number78P4197
ManufacturerIBM
InterfaceDDR4
Capacity16GB
Speed2666MHz
FITS THESE MACHINES
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IBM 8247-22L (S22L) Power8
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IBM 8408-44E (Power E850C) Power8
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+ 181 more verified machines
COMPONENT DIAGRAM
ECC 16GB 2Rx4 PC4 2666MHz RDIMM IBM NOTCH ~133.35 mm DDR4 RDIMM | 16GB | 2666MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 78P4197 MFR IBM 16GB 2666MHz
KEY FEATURES
•
DDR4 Interface
•
16GB Capacity
•
2666MHz Speed
•
DDR4 RDIMM
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 2
324ESubstituteBROKER-VERIFIED
IBM 16GB DDR4 2666Mhz RDIMM Memory P9
substitute
EM62SubstituteBROKER-VERIFIED
IBM 16GB DDR4 2666Mhz RDIMM Memory P9
substitute
LIFECYCLE

No lifecycle data available.

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FREQUENTLY ASKED QUESTIONS
What is 78P4197?
78P4197 is a IBM 16GB DDR4 2666Mhz RDIMM Memory P9 manufactured by IBM. It is classified as a MEMORY (RDIMM).
What parts can replace 78P4197?
There are 2 known substitutes for 78P4197: 324E, EM62. Substitute compatibility should be verified for your specific system.
Is 78P4197 still available?
78P4197 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.