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95Y4820 — Memory Specs & Substitutes

IBM · DIMM
WHAT YOU NEED TO KNOW
2Rx4 = Dual Rank ×4 chip width (standard server) RDIMM = Registered (servers) | LRDIMM = Load-Reduced (max density)
DDR3 ≠ DDR4 ≠ DDR5 — physically incompatible (notch position)
PRODUCT OVERVIEW

IBM 16Gb PC4-2133P-R ECC REG DR x4 CAS-15 DIMM - P/N. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
95Y4820
SPECIFICATIONS
Part Number95Y4820
ManufacturerIBM
Capacity16GB
Speed2133MHz
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 PC4 2133MHz RDIMM IBM NOTCH ~133.35 mm DDR4 RDIMM | 16GB | 2133MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 95Y4820 MFR IBM 16GB 2133MHz
KEY FEATURES
•
16GB Capacity
•
2133MHz Speed
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 4
95Y4821CompatiblePARTNER
IBM 16Gb PC4-2133P-R ECC REG DR x4 CAS-15 (1x16Gb) Memory Kit for Flex System x240 M5 - Option
compatible
00NU400CompatiblePARTNER
IBM 16GB PC4-2133P-R ECC Reg Dr X4 Cas-15 Dimm - P/n
compatible
01DE966CompatiblePARTNER
IBM 16GB PC4-2133P-R ECC Reg Dr X4 Cas-15 Dimm - Fru
compatible
95Y4823CompatiblePARTNER
IBM 16GB PC4-2133P-R ECC Reg Dr X4 Cas-15 Dimm - Fru
compatible
LIFECYCLE

No lifecycle data available.

THIS PART SUBSTITUTES FOR 4
95Y4821SUBSTITUTE
IBM 16Gb PC4-2133P-R ECC REG DR x4 CAS-15 (1x16Gb) Memory Kit for Flex System x240 M5 - SBB
IBM
95Y4823SUBSTITUTE
IBM 16Gb PC4-2133P-R ECC REG DR x4 CAS-15 (1x16Gb) Memory Kit for Flex System x240 M5 - SBB
IBM
00NU400SUBSTITUTE
IBM 16Gb PC4-2133P-R ECC REG DR x4 CAS-15 (1x16Gb) Memory Kit for Flex System x240 M5 - SBB
IBM
01DE966SUBSTITUTE
IBM 16Gb PC4-2133P-R ECC REG DR x4 CAS-15 (1x16Gb) Memory Kit for Flex System x240 M5 - SBB
IBM
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FREQUENTLY ASKED QUESTIONS
What is 95Y4820?
95Y4820 is a IBM 16Gb PC4-2133P-R ECC REG DR x4 CAS-15 DIMM - P/N manufactured by IBM.
What parts can replace 95Y4820?
There are 4 known substitutes for 95Y4820: 95Y4821, 00NU400, 01DE966 and 1 more. Substitute compatibility should be verified for your specific system.
Is 95Y4820 still available?
95Y4820 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.