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7X77A01305 — Memory Specs & Substitutes

LENOVO · MEMORY · LRDIMM
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

Lenovo 64GB TruDDR4 2666 MHz (4Rx4 1.2V) LRDIMM. Key specifications include ECC: Yes, Component for: PC/Server, Memory voltage: 1.2 V, Internal memory: 64 GB, Memory clock speed: 2666 MHz, Memory form factor: 288-pin DIMM. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MEMORY→ LRDIMM→ 7X77A01305
SPECIFICATIONS
ECCYes
Component forPC/Server
Memory voltage1.2 V
Internal memory64 GB
Memory clock speed2666 MHz
Memory form factor288-pin DIMM
Internal memory typeDDR4
Harmonized System (HS) code84733020
Memory layout (modules x size)1 x 64 GB
BROWSE LENOVO MACHINES
ThinkSystem SR650 V1 ThinkSystem SR650 V2 ThinkSystem SR630 V1 ThinkSystem SR630 V2 System x3650 M5 System x3550 M5 ThinkServer RD550 System x IBM System x3650 M4 ThinkServer RD650 SD530 System x3500 M4 ThinkServer RD350
All Lenovo machines and parts
COMPONENT DIAGRAM
ECC 64GB 2Rx4 PC4 2666MHz LRDIMM LENOV NOTCH ~133.35 mm DDR4 LRDIMM | 64GB | 2666MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 LRDIMM PN 7X77A01305 MFR LENOVO 64GB 2666MHz
KEY FEATURES
•
Up to 64 GB
•
DDR4 Interface
•
64GB Capacity
•
2666MHz 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
M386A8K40BM2CTDSubstituteBROKER-VERIFIED
Samsung 64GB (1x64gb) 4Rx4 Pc4-21300V-L DDR4-2666MHZ LRDIMM
substitute
01DE975SubstituteBROKER-VERIFIED
01DE975
substitute
SM30L13369CompatiblePARTNER
IBM 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM for ThinkSystem - P/N
compatible
SM30L13370CompatiblePARTNER
IBM 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM for ThinkSystem - P/N
compatible
LIFECYCLE

No lifecycle data available.

THIS PART SUBSTITUTES FOR 3
SM30L13369SUBSTITUTE
IBM 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 (1x64Gb) Memory Kit for ThinkSystem - Option
LENOVO
SM30L13370SUBSTITUTE
IBM 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 (1x64Gb) Memory Kit for ThinkSystem - Option
LENOVO
01DE975SUBSTITUTE
IBM 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 (1x64Gb) Memory Kit for ThinkSystem - Option
LENOVO
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FREQUENTLY ASKED QUESTIONS
What is 7X77A01305?
7X77A01305 is a Lenovo 64GB TruDDR4 2666 MHz (4Rx4 1.2V) LRDIMM manufactured by LENOVO. It is classified as a MEMORY (LRDIMM).
What parts can replace 7X77A01305?
There are 4 known substitutes for 7X77A01305: M386A8K40BM2CTD, 01DE975, SM30L13369 and 1 more. 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.