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

Kingston Technology Corp.

Kingston KCP426NS6/4 4GB DDR4 2666 CL19 desktop RAM

SKU CH-6X3X-JQJ0G

4GB DDR4 2666 desktop memory with CL19 latency for standard system upgrades

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • 4 GB capacity adds headroom for everyday multitasking
  • DDR4 2666 speed delivers PC4 21300 bandwidth for responsive performance
  • CL19 latency keeps timing tight for stable operation
  • Unbuffered non-ECC design fits standard desktop motherboards
  • Kingston quality ensures reliable operation across compatible systems

Kingston 4GB DDR4 2666 module

This 4GB DDR4 memory module runs at 2666 MT/s with a CAS latency of 19. It is built for desktop systems that need a basic capacity increase for everyday tasks such as web browsing, office applications and light multitasking. The single stick fits a standard DIMM slot and requires no extra configuration beyond a compatible motherboard.

Standard JEDEC profile out of the box

The module follows the PC4 21300 JEDEC specification, so it operates at its rated speed and timing without manual BIOS changes. There is no RGB lighting or heat-spreader included, keeping the design plain for broad chassis compatibility. This simplicity means the stick works immediately in boards that support the DDR4 2666 standard.

DDR4 2666 ceiling limits headroom

The 2666 MT/s data rate and CL19 latency set a firm performance ceiling; the memory cannot run faster or tighter without overclocking, which the module is not validated for. Systems that benefit from higher bandwidth or lower latency will not see gains from this kit. Builders needing more than 4GB of capacity or speeds above 2666 MT/s should look for different modules.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $25.99
Cheaper than about 82% of the 3,647 comparable items (median $90.99).
Total capacity 4 GB
Lower than about 80% of the 3,251 comparable items (median 16 GB).
Price per GB $6.50 per GB
Typical for this category: the median of 3,251 items is $6.75 per GB.

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Specifications

Product
Brand nameKingston
Model nameKCP426NS6/4
Total capacity4 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
More details
LED lightingNone

Questions about this item

Will the CL19 timing need any adjustment or replacement over time?

The CL19 timing is fixed by the module's SPD profile and does not drift or require recalibration; no maintenance or replacement is needed for the latency setting itself.

What limit appears first when the module runs at DDR4 2666 continuously?

The CL19 CAS latency is the primary timing constraint at the rated 2666 MT/s speed; sustained operation stays within this specification.

How much heat or noise does the 4GB stick produce during all-day use?

The module has no LED or active cooling, so it runs silently; heat output is low for a 4GB DDR4 2666 stick under typical desktop workloads.

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