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43X5294 — Memory Specs & Substitutes

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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 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile 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
43X5294
SPECIFICATIONS
Part Number43X5294
ManufacturerIBM
Capacity8GB
Speed1066MHz
COMPONENT DIAGRAM
ECC 8GB 2Rx4 PC4 1066MHz RDIMM IBM NOTCH ~133.35 mm DDR4 RDIMM | 8GB | 1066MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 43X5294 MFR IBM 8GB 1066MHz
KEY FEATURES
•
8GB 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
44T1579CompatiblePARTNER
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile (1x8Gb) Memory Kit for HS22/HS22V - Option
compatible
43X5303CompatiblePARTNER
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - P/N
compatible
43X6303CompatiblePARTNER
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - P/N
compatible
44T1580CompatiblePARTNER
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - FRU
compatible
46C0529CompatiblePARTNER
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - FRU
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 5
43X5303SUBSTITUTE
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - P/N
IBM
43X6303SUBSTITUTE
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - P/N
IBM
44T1579SUBSTITUTE
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - P/N
IBM
44T1580SUBSTITUTE
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - P/N
IBM
46C0529SUBSTITUTE
IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - P/N
IBM
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FREQUENTLY ASKED QUESTIONS
What is 43X5294?
43X5294 is a IBM 8Gb PC3-8500R 1066Mhz ECC REG DR x4 CAS-7 Low Profile DIMM - P/N manufactured by IBM.
What parts can replace 43X5294?
There are 5 known substitutes for 43X5294: 44T1579, 43X5303, 43X6303 and 2 more. Substitute compatibility should be verified for your specific system.
Is 43X5294 still available?
43X5294 is currently Unknown.
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Last verified: October 2026