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Green printed circuit board DDR4 memory module with black chips and gold edge connectors

Computer Memory Solutions

Computer Memory Solutions 4GB DDR4 2666MHz CL19 2Rx8 1.2V 288-pin DIMM memory upgrade

SKU CH-N6J8-5ENAH

4GB DDR4 2666MHz CL19 2Rx8 1.2V 288-pin DIMM adds capacity to compatible desktops and workstations

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latency19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • 4GB DDR4 module expands system memory for everyday computing
  • 2666 MHz speed with PC4-21300 rating delivers responsive data transfer
  • CL19 latency at 1.2V provides efficient operation
  • 2Rx8 unbuffered 288-pin DIMM fits standard desktop slots
  • Major-brand chipset ensures reliable compatibility and stability

4GB DDR4-2666 DIMM for system upgrades

This 4GB DDR4 module runs at 2666MHz with a CAS latency of 19 and operates at 1.2V. It is built as a 2Rx8 unbuffered DIMM using a 288-pin layout. The part suits owners of compatible desktops or workstations who need a single replacement stick or a basic capacity increase.

DDR4-2666 speed ceiling and single-stick bandwidth

The DDR4-2666 interface caps peak transfer rate at PC4-21300, so the module cannot exceed that throughput regardless of other hardware. Running a single DIMM leaves the memory controller in single-channel mode, halving potential bandwidth compared with a matched pair. Mixing this stick with slower modules forces the entire array down to the lowest common speed.

2Rx8 rank layout decides motherboard compatibility

The 2Rx8 organisation determines whether a given board can address the full 4GB; some chipsets only accept 1Rx8 modules at this density. Buyers must verify that their system explicitly supports 2Rx8 DDR4 DIMMs before purchasing, otherwise the memory may not be recognised or may run at reduced capacity.

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).
CAS latency 19
Lower than about 70% of the 483 comparable items (median 22).
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
Part numberCM512642666DIMM
Total capacity4 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latency19
Memory timings19-19-19
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Power
Rated voltage1.2 V

Questions about this item

Should I pick the 4GB 2666MHz CL19 2Rx8 module or look for a different capacity?

This listing is a single 4GB DDR4 2666MHz CL19 2Rx8 1.2V 288-pin DIMM. If you need more capacity, add identical modules in matched pairs for dual-channel performance.

Will the 2666MHz rating actually run at that speed in my system?

The module is rated DDR4-2666 (PC4-21300) with CL19 19-19-19 timing. Installed speed will match the slowest module present or the CPU and motherboard limit, whichever is lower.

Is this a standard DDR4 288-pin DIMM that fits regular desktop slots?

Yes, it is an unbuffered non-ECC DDR4 288-pin DIMM at 1.2V, compatible with standard desktop DDR4 slots that accept 2666MHz modules.

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