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Single green 240-pin DDR3 DIMM module with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions 4GB DDR3 1333MHz CL9 1.5V DIMM Lenovo H520S

SKU CH-5MAN-QTC3A

A 4 GB DDR3 1333 MHz CL9 unbuffered DIMM built for Lenovo H520S systems

  • Total capacity4 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL9
  • Memory timings9-9-9
  • Rated voltage1.5 V
  • 4GB DDR3 1333 MHz boosts Lenovo H520S responsiveness
  • CL9 9-9-9 timing delivers stable 1.5 V operation
  • 240-pin unbuffered non-ECC design fits 2561-xxx and 4746-xxx systems
  • Single 4 GB module enables cost-effective capacity upgrade
  • Major-brand chipset with limited lifetime warranty ensures long-term reliability

4GB DDR3 DIMM for Lenovo H520S

This 4GB DDR3 module runs at 1333MHz with CL9 timing and 1.5V operation. It is a 240-pin unbuffered non-ECC stick built with major-brand chips. The part is validated for Lenovo H520S systems in the 2561 and 4746 series.

Suits owners adding a single stick to a free slot

Buyers who need ECC error correction or registered buffering should look elsewhere. The module is a single-rank 1Rx8 design without a heat spreader. Systems limited to lower voltages or different pin counts cannot use this memory.

Installs in a 240-pin DDR3 slot on the H520S board

The motherboard provides two sockets with a maximum of 8GB total capacity. If 4GB is already present the recognised amount may drop to 3.5GB depending on configuration. Modules must be ordered and installed in pairs to enable dual-channel mode. A 64-bit operating system is required for full addressable memory.

How it compares

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

Price $14.99
Cheaper than about 94% 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 $3.75 per GB
Cheaper than about 86% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126410600DIMMSR
Total capacity4 GB
Product type240-Pin DDR3 SDRAM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL9
Memory timings9-9-9
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo H520S Series 2561-Xxx; 4746-Xxx
In the box
Included items1 Memory RAM Stick

Questions about this item

Does this 240-pin DDR3 module work in the two slots of my Lenovo H520S?

The H520S has two DIMM sockets and supports up to 8 GB total. Install this 4 GB stick in either slot; add a matching stick for dual-channel operation.

Can I keep my existing 1333 MHz DDR3 stick and add this CL9 module?

Yes, both run at 1333 MHz. The system will operate at the slower timing of the two modules, so pair with another CL9 stick for best stability.

How do I verify the stick is recognised at 1333 MHz after fitting it?

Open Task Manager’s Performance tab or the BIOS memory screen; the speed should read 1333 MHz and total capacity should increase by 4 GB.

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