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Green circuit board with black memory chips and gold edge connector

Computer Memory Solutions

Computer Memory Solutions CM5126412800SOSRL 4GB DDR3L 1600 memory upgrade Dell Inspiron 15 3521

SKU CH-GBZH-EGDQF

4 GB DDR3L 1600 SO-DIMM memory upgrade for Dell Inspiron 15 3521 notebook

  • Total capacity4 GB
  • Rated speedDDR3L 1600 (PC3L 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Memory timings11-11-11
  • Rated voltage1.35 V
  • 4GB DDR3L 1600MHz boosts multitasking on Dell Inspiron 15 3521
  • 35V low-voltage DDR3L reduces power draw versus standard DDR3
  • CL11 11-11-11 timing delivers responsive 1600MHz performance
  • 204-pin SODIMM installs directly into notebook memory slot
  • Computer Memory Solutions guarantees compatibility with Dell Inspiron 3521

4GB DDR3L 1600 SODIMM for Dell Inspiron 3521

This 4GB module is a 204-pin DDR3L SODIMM rated at 1600MHz (PC3L-12800) with CL11 timings and 1.35V operation. It is an unbuffered, non-ECC stick built with major-brand chips and no heat spreader. The part is guaranteed compatible with the Dell Inspiron 15 (3521) notebook.

Suitable for single-slot upgrades on the Inspiron

The system accepts two modules for a maximum of 16GB, but modules must be installed in pairs to enable dual-channel mode. Buyers who want more than 4GB of total memory or who need dual-channel bandwidth should order a second identical stick. A 64-bit operating system is required to address the full 16GB capacity.

Handles everyday workloads.

One 4GB stick runs office applications, web browsing and light multitasking comfortably. Performance runs out when memory pressure exceeds the single-channel bandwidth or the 4GB physical limit, which the OS may report as 3.5GB or less depending on system allocation. Adding a matched second module doubles both capacity and throughput.

How it compares

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

Price $20.99
Cheaper than about 90% 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 $5.25 per GB
Cheaper than about 73% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126412800SOSRL
Total capacity4 GB
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3L 1600 (PC3L 12800)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL11
Memory timings11-11-11
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsDell Inspiron 15 (3521) Notebook
In the box
Included items1 Memory RAM Stick

Questions about this item

Will this 204-pin DDR3L SODIMM fit and run in my Dell Inspiron 15 3521 notebook?

Yes, the module is system-specific for the Inspiron 15 3521 and uses the 204-pin DDR3L SO-DIMM form factor that the notebook accepts.

Can I install this single 4 GB stick alongside an existing module in the second slot?

The system has two sockets and supports up to 16 GB total; a single 4 GB module will work, though maximum dual-channel performance requires matched pairs.

How do I verify the stick is running at 1600 MHz with CL11 timing after installation?

Check the memory speed and CAS latency in the BIOS or a system-information utility; they should show 1600 MHz and 11-11-11 timings at 1.35 V.

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