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49Y3757 — Memory Specs & Substitutes

Lenovo · 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

Lenovo 49Y3757 memory module 4 GB 1 x 4 GB DDR3 240-pin DIMM ECC. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
49Y3757
SPECIFICATIONS
Part Number49Y3757
ManufacturerLenovo
InterfaceDDR3
Capacity4GB
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 4GB 2Rx4 PC3 — RDIMM Lenov NOTCH ~133.35 mm DDR3 RDIMM | 4GB | — | PC3 Notch position = DDR3 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR3 RDIMM PN 49Y3757 MFR Lenovo 4GB —
KEY FEATURES
•
DDR3 Interface
•
4GB Capacity
•
DDR3 Memory
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 5
49Y1435CompatiblePARTNER
IBM 4Gb PC3-10600R 1333Mhz ECC REG DR x4 CAS-9 (1x4Gb) Memory Kit for M3 - Option
compatible
46C0596CompatiblePARTNER
IBM 4GB Pc3-10600r 1333MHZ ECC Reg Dr X4 Cas-9 Dimm - Sbb
compatible
47J0156CompatiblePARTNER
IBM 4GB Pc3-10600r 1333MHZ ECC Reg Dr X4 Cas-9 Dimm - P/n
compatible
49Y1445CompatiblePARTNER
IBM 4GB Pc3-10600r 1333MHZ ECC Reg Dr X4 Cas-9 Dimm - Fru
compatible
49Y3746CompatiblePARTNER
IBM 4Gb PC3-10600R 1333Mhz ECC REG DR x4 CAS-9 (1x4Gb) Memory Kit for M3 - Option
compatible
LIFECYCLE

No lifecycle data available.

THIS PART SUBSTITUTES FOR 5
46C0596SUBSTITUTE
IBM 4Gb PC3-10600R 1333Mhz ECC REG DR x4 CAS-9 (1x4Gb) Memory Kit for M3 - Option
IBM
47J0156SUBSTITUTE
IBM 4Gb PC3-10600R 1333Mhz ECC REG DR x4 CAS-9 (1x4Gb) Memory Kit for M3 - Option
IBM
49Y1435SUBSTITUTE
IBM 4Gb PC3-10600R 1333Mhz ECC REG DR x4 CAS-9 (1x4Gb) Memory Kit for M3 - Option
IBM
49Y1445SUBSTITUTE
IBM 4Gb PC3-10600R 1333Mhz ECC REG DR x4 CAS-9 (1x4Gb) Memory Kit for M3 - Option
IBM
49Y3746SUBSTITUTE
IBM 4Gb PC3-10600R 1333Mhz ECC REG DR x4 CAS-9 (1x4Gb) Memory Kit for M3 - Option
IBM
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FREQUENTLY ASKED QUESTIONS
What is 49Y3757?
49Y3757 is a Lenovo 49Y3757 memory module 4 GB 1 x 4 GB DDR3 240-pin DIMM ECC manufactured by Lenovo.
What parts can replace 49Y3757?
There are 5 known substitutes for 49Y3757: 49Y1435, 46C0596, 47J0156 and 2 more. Substitute compatibility should be verified for your specific system.
Is 49Y3757 still available?
49Y3757 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.