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Green rectangular circuit board with gold edge connector and black memory chips

OWC

OWC 8S5D32R804GB 4GB DDR3 1066 CL7 2Rx8 204-pin 1.5V Non-ECC SODIMM memory upgrade

SKU CH-S45K-ZMDXP

A 4GB DDR3 1066 CL7 SODIMM upgrade for compatible Lenovo ThinkPad T400, T400s, T410i, T410s, T410si, T500 and T510i laptops

  • Capacity4GB
  • Type204-Pin DDR3 Non-ECC SODIMM
  • SpeedDDR3 1066 (PC3 8500)
  • CAS LatencyCL7
  • Voltage1.5V
  • ECCNo
  • 4 GB capacity lets you run more apps simultaneously
  • DDR3 1066 CL7 timing keeps latency low for snappy response
  • 204-pin SODIMM fits Lenovo ThinkPad T400, T400s, T410i, T410s, T410si, T500, T510i
  • 5 V JEDEC-standard voltage ensures stable, warranty-safe operation
  • Non-ECC unbuffered design installs easily with no configuration needed

Capacity & Form Factor

This OWC module is a 4GB DDR3 SODIMM built to the 204-pin SO-DIMM standard. It runs at 1066 MHz with PC3-8500 bandwidth and CL7 latency at 1.5V, using an unbuffered 2Rx8 non-ECC design without a heat spreader. The stick is validated for Lenovo ThinkPad T400, T400s, T410i, T410s, T410si, T500 and T510i models.

Who It Suits

Owners of the listed ThinkPad laptops who need a single 4GB DDR3 1066 SODIMM to restore or expand system memory will find this module a direct fit. It meets JEDEC and RoHS standards for a warranty-safe upgrade. Buyers whose laptops require ECC, registered DIMMs, higher speeds, or capacities beyond 4GB per slot cannot use this part.

Deciding Specification

The memory uses DDR3 technology at 1066 MHz with a 204-pin SO-DIMM form factor. Only systems that accept DDR3 PC3-8500 non-ECC SODIMMs at 1.5V can install this module. Verify your laptop's memory generation and pin count before purchase.

Highlights

  • 4 GB capacity lets you run more apps simultaneously
  • DDR3 1066 CL7 timing keeps latency low for snappy response
  • 204-pin SODIMM fits Lenovo ThinkPad T400, T400s, T410i, T410s, T410si, T500, T510i
  • 5 V JEDEC-standard voltage ensures stable, warranty-safe operation
  • Non-ECC unbuffered design installs easily with no configuration needed

Specifications

BrandOWC
Part Number8S5D32R804GB
Capacity4GB
Type204-Pin DDR3 Non-ECC SODIMM
SpeedDDR3 1066 (PC3 8500)
CAS LatencyCL7
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkPad T400
Lenovo ThinkPad T400s
Lenovo ThinkPad T410i
Lenovo ThinkPad T410s
Lenovo ThinkPad T410si

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Questions about this item

Does the OWC 8S5D32R804GB module ship alone or with any extra parts such as a screwdriver or thermal pad?

The package contains a single 4GB DDR3 1066 CL7 2Rx8 204-pin 1.5V Non-ECC SODIMM module. No tools, screws or thermal pads are included.

My ThinkPad T410i has two slots — should I buy one 4GB stick or two for 8GB total?

Each stick is 4GB. Installing two modules gives 8GB and enables dual-channel bandwidth on T410i, T410s, T510i and the other listed models.

The spec says PC3-8500 1066 CL7 — will that actually run at 1066 MHz inside a T400s?

Yes. The module is JEDEC-standard DDR3 1066 (PC3-8500) CL7 at 1.5V, so the T400s memory controller will operate it at its rated 1066 MHz speed.

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