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Green 204-pin DDR3 SO-DIMM circuit board with black memory chips

Computer Memory Solutions

Computer Memory Solutions CM5126410600SODRH 4GB DDR3 1333 SO-DIMM ThinkPad X220i 4286 4287

SKU CH-NEZ4-CNXGB

4GB DDR3 1333 SO-DIMM module with CL7 timing for Lenovo ThinkPad X220i 4286 and 4287 series

  • Total capacity4 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 4GB capacity adds responsive multitasking headroom for ThinkPad X220i
  • DDR3-1333 speed matches factory spec for stable operation
  • CL7 timing delivers low latency data access
  • 204-pin SO-DIMM form factor fits laptop memory slot directly
  • 5V voltage ensures efficient power use without extra cooling

4GB DDR3 SO-DIMM for ThinkPad X220i

This 4GB DDR3-1333 (PC3-10600) SO-DIMM is built to upgrade Lenovo ThinkPad X220i models 4286-xxx and 4287-xxx. It uses a 204-pin unbuffered non-ECC layout with CL7 7-7-7 timing at 1.5V and contains a single 2Rx8 rank module.

Suits owners of compatible X220i units needing

The module fits only the listed ThinkPad X220i series and provides exactly 4GB of capacity. Buyers who want more storage or a multi-module kit should look elsewhere. Systems requiring ECC or registered memory will not accept this stick.

CL7 7-7-7 timing at 1.5V determines compatibility

The CAS latency and voltage combination must match the platform memory controller specifications. If the laptop BIOS expects a different timing or voltage profile the module will not post.

How it compares

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

Price $17.99
Cheaper than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $4.50 per GB
Cheaper than about 81% of the 20,941 comparable items (median $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 nameComputer Memory Solutions
Model nameCM5126410600SODRH
Total capacity4 GB
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL7
Memory timings7-7-7
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo Thinkpad X220I 4286-Xxx; 4287-Xxx Seri
In the box
Included items1 Memory RAM Stick

Questions about this item

What speed does the PC3-10600 DDR3 interface actually run at in the ThinkPad X220i?

The module is rated DDR3-1333 (PC3-10600). The X220i memory controller supports up to 1333 MHz, so the stick will operate at its full rated speed.

Will the 204-pin SO-DIMM fit the X220i memory slot without a height issue?

Yes. The stick is a standard 204-pin DDR3 SO-DIMM with no heat spreader, matching the X220i slot and low-profile chassis clearance.

Do I need to configure anything in BIOS after installing the 4 GB CL7 module?

No. The X220i detects the 1.5 V, unbuffered, non-ECC 2Rx8 module automatically; just seat the SO-DIMM firmly until the clips click.

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