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Green 204-pin DDR3 SODIMM module with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions 8GB DDR3 1333 SODIMM memory upgrade

SKU CH-J5JF-YRFPX

8GB DDR3 1333 SODIMM module built for Lenovo ThinkPad T520 models 4239, 4240, 4241, 4242 and 4243

  • Total capacity8 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL9
  • Memory timings9-9-9
  • Rated voltage1.5 V
  • 8 GB DDR3 1333 MHz capacity boosts multitasking for ThinkPad T520
  • CL9 9-9-9 timing at 1.5 V delivers responsive DDR3 performance
  • 204-pin SO-DIMM form factor fits T520 models 4239 4240 4241 4242 4243
  • Single 8 GB module uses 2Rx8 rank for efficient slot usage
  • Unbuffered non-ECC design matches factory memory specifications

8GB DDR3 SODIMM for ThinkPad T520

This 8 GB DDR3 SODIMM module is built for Lenovo ThinkPad T520 models 4239, 4240, 4241, 4242 and 4243. It runs at 1333 MHz with CL9 timing and 1.5 V unbuffered operation. The single 204-pin stick uses a 2Rx8 rank layout and major-brand chips. It targets owners of these specific laptops who need a straightforward capacity increase.

Upgrading from 4 GB or smaller modules

The T520 ships with two SODIMM sockets and a factory ceiling of 8 GB total. Fitting this 8 GB stick replaces a 4 GB module and reaches the system maximum in one slot, leaving the second socket free. The jump is worthwhile when the current memory is a bottleneck for multitasking or 64-bit workloads. Buyers whose workload already fits in 4 GB will not see a speed gain from the extra capacity alone.

Tool-free slot access under a bottom cover

Installation requires removing the single memory-panel screw on the underside of the T520, then pressing the module into the SODIMM socket until the side clips latch. No thermal pad or heat spreader is involved. The most common issue is inserting the stick at the wrong angle so the notch does not align with the 204-pin key. If the laptop fails to POST, reseat the module firmly and verify the socket is clean.

How it compares

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

Price $24.99
Cheaper than about 88% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $3.12 per GB
Cheaper than about 89% 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 nameCM10246410600SODRH
Total capacity8 GB
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL9
Memory timings9-9-9
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo Thinkpad T520 4239; 4240, 4241, 4242, 4243
In the box
Included items1 Memory RAM Stick

Questions about this item

Does the 204-pin DDR3 SO-DIMM fit the memory slot of a Lenovo ThinkPad T520 4240?

Yes, the module is listed as compatible with the ThinkPad T520 4239, 4240, 4241, 4242 and 4243 models.

What is the correct way to seat the 204-pin SO-DIMM so the side clips engage?

Align the notch on the module with the key in the slot, insert at an angle until the gold contacts are fully hidden, then press down evenly until both retention clips snap into the side notches.

Will the 1.5 V DDR3 1333 module need a firmware update or voltage adjustment later?

No, it runs at the standard 1.5 V with CL9 9-9-9 timings and is unbuffered non-ECC, so no BIOS voltage change or firmware update is required.

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