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Technical Data Sheet
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43X5055 — Technical Data Sheet

IBM · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

IBM 4Gb PC3-8500R 1066Mhz ECC REG QR x4 CAS-7 (1x4Gb) Memory Kit for M3 / x3850/x3950 X5 - Option. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
43X5055
SPECIFICATIONS
Part Number43X5055
ManufacturerIBM
Capacity4GB
Speed1066MHz
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: IBM CAP: 4GB SPEED: 1066MHz IBM 4Gb PC3-8500R 1066Mhz ECC REG QR x4 CAS-7 (1x4Gb) M... TITLE COMPONENT PN 43X5055 MFR IBM IBM 4Gb PC3-8500R 1066
KEY FEATURES
•
4GB Capacity
•
1066MHz 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 3
46C7448CompatiblePARTNER
IBM 4Gb PC3-8500R 1066Mhz ECC REG QR x4 CAS-7 (1x4Gb) Memory Kit for M3 / x3850/x3950 X5 - Option
compatible
46C7444CompatiblePARTNER
IBM 4Gb PC3-8500R 1066Mhz ECC REG QR x4 CAS-7 (1x4Gb) Memory Kit for M3 / x3850/x3950 X5 - SBB
compatible
46C7452CompatiblePARTNER
IBM 4GB Pc3-8500r 1066MHZ ECC Reg Qr X4 Cas-7 Dimm - Fru
compatible
LIFECYCLE

No lifecycle data available.

THIS PART SUBSTITUTES FOR 3
46C7444SUBSTITUTE
IBM 4Gb PC3-8500R 1066Mhz ECC REG QR x4 CAS-7 DIMM - P/N
IBM
46C7448SUBSTITUTE
IBM 4Gb PC3-8500R 1066Mhz ECC REG QR x4 CAS-7 DIMM - P/N
IBM
46C7452SUBSTITUTE
IBM 4Gb PC3-8500R 1066Mhz ECC REG QR x4 CAS-7 DIMM - P/N
IBM
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FREQUENTLY ASKED QUESTIONS
What is 43X5055?
43X5055 is a IBM 4Gb PC3-8500R 1066Mhz ECC REG QR x4 CAS-7 (1x4Gb) Memory Kit for M3 / x3850/x3950 X5 - Option manufactured by IBM.
What parts can replace 43X5055?
There are 3 known substitutes for 43X5055: 46C7448, 46C7444, 46C7452. Substitute compatibility should be verified for your specific system.
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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.