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Green 204-pin DDR3 SO-DIMM module with black chips

Computer Memory Solutions

Computer Memory Solutions 4GB DDR3 1333 SO-DIMM CL7 1.5V 2Rx8

SKU CH-M9JR-SQ5MV

4GB DDR3 1333MHz CL7 SO-DIMM laptop memory upgrade for Asus X55C series

  • Total capacity4 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • CL7 latency speeds up data access
  • 5 V operation matches standard laptop requirements
  • 204-pin SO-DIMM fits the Asus X55C slot
  • 4 GB capacity adds responsive multitasking headroom
  • 1333 MHz DDR3 rating aligns with system spec

Specific Use Upgrade

This 4GB DDR3 1333 SO-DIMM module is built for owners of the Asus X55C series laptop who need a single stick to reach the platform limit. The 204-pin form factor, CL7 timing and 1.5V operation match the original specification.

Not for Dual-Channel or Higher Capacity

Buyers who want dual-channel performance should look elsewhere because only one stick is supplied and the laptop has two sockets. Systems that require ECC, registered memory or a different voltage will not accept this part.

Decisive Specification

The 2Rx8 rank organisation is the single detail that determines whether the memory controller recognises the full 4GB; mismatched ranks will cause the laptop to see only half the capacity or fail to boot.

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 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $4.25 per GB
Cheaper than about 83% 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 systemsAsus/Asmobile X55C X55C-Hpd111F 15.6 Laptop
In the box
Included items1 Memory RAM Stick

Questions about this item

My laptop has two SO-DIMM slots and one is already filled — will this 204-pin DDR3 1333 module work alongside the existing stick?

Yes, the unbuffered non-ECC module installs in any free 204-pin slot; the system will run both sticks at the lowest common speed and timing.

I still use an older 1.5 V DDR3 SO-DIMM in the other slot — is voltage mismatch a concern?

No, this stick also runs at 1.5 V, so both modules share the same voltage rail without conflict.

After fitting the module, how can I confirm the CL7 timing is active?

Open the BIOS or a tool such as CPU-Z and verify the memory tab shows 1333 MHz with 7-7-7 timings at 1.5 V.

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