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

OWC

OWC 1S3D31R802GB 2GB DDR3 1333 CL9 1.5V SODIMM for ThinkPad Edge E425 E520 E525

SKU CH-E7EY-2W767

A 2GB DDR3 SODIMM running at 1333MHz CL9 1.5V, built for ThinkPad Edge E425 E520 E525 laptops

  • Total capacity2 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • CAS latencyCL9
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • 2GB capacity adds multitasking headroom for Edge E425 E520 E525
  • DDR3 1333 CL9 1.5V matches factory specifications exactly
  • 204-pin SODIMM form factor fits laptop memory slots directly
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Single 1Rx8 rank module installs without configuration changes

Targeted Capacity Upgrade

This 2 GB DDR3 SODIMM is built specifically for Lenovo ThinkPad Edge E425, E520 and E525 laptops. It serves owners of those models who need a single-module capacity increase without replacing an existing pair.

Slot-Ready Integration

The module uses a 204-pin DDR3 interface at 1.5 V and requires an available SODIMM slot in the compatible ThinkPad. Adding it frees the system from relying on a single channel when the second slot is empty, improving multitasking headroom for everyday workloads.

Low-Power Operation

Running at 1333 MHz with CL9 latency and no heat spreader, the unbuffered non-ECC stick draws minimal power and produces no audible noise. Its JEDEC-standard voltage keeps thermals negligible inside the slim ThinkPad chassis during normal use.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 93% of the 21,161 comparable items (median $397.99).
Total capacity 2 GB
Lower than about 95% of the 20,941 comparable items (median 32 GB).
Price per GB $8.50 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number1S3D31R802 GB
Total capacity2 GB
Product type204-Pin DDR3 Non-ECC SODIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Memory
CAS latencyCL9
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo ThinkPad Edge E425
Lenovo ThinkPad Edge E520
Lenovo ThinkPad Edge E525

Other versions of this model

5 more in the same range

Questions about this item

What is the maximum sustained speed this DDR3 1333 CL9 module will run at in a ThinkPad Edge E525?

The module operates at its rated 1333 MHz speed under sustained load; DDR3 1333 is the limit set by the JEDEC specification for this part.

How much heat or noise does this 1.5 V SODIMM add when the laptop runs all day?

It has no heat spreader and draws only 1.5 V, so it adds negligible heat and zero noise during continuous operation.

Which slot type must the ThinkPad already have for this 204-pin SODIMM to fit?

The system needs a DDR3 204-pin SODIMM slot, which the Edge E425, E520 and E525 all provide.

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