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Green 260-pin DDR4 SO-DIMM module with black chips

Kingston Technology Corp.

Kingston Technology Corp. KCP421SS8/4 4GB DDR4 2133 CL15 260-Pin SO-DIMM memory upgrade

SKU CH-2VWJ-A371D MPN KCP421SS8/4

4GB DDR4 2133 SO-DIMM for select Acer, Dell, Fujitsu, HP and Lenovo laptops

  • Total capacity4 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Product type260-Pin DDR4 SO-DIMM
  • 4GB capacity adds responsive multitasking headroom
  • DDR4 2133 speed matches supported laptop specs
  • CL15 latency keeps data access snappy
  • 20V operation reduces power draw and heat
  • 260-pin SO-DIMM fits select Acer, Dell, Fujitsu, HP and Lenovo models

4GB DDR4 SO-DIMM for select laptops

This 4GB module is built for specific Acer, Dell, Fujitsu, HP, and Lenovo laptops that require DDR4 2133 memory. It targets owners of those machines who need a direct replacement or a single-slot capacity increase.

Unbuffered 260-pin layout at 1.20V

The stick uses a standard 260-pin SO-DIMM edge connector and runs at the DDR4 baseline voltage of 1.20V. Its unbuffered, non-ECC design fits the memory slots of the supported models without adapters or configuration changes.

CL15 latency at the PC4-17000 data rate

Operating at DDR4 2133 with a CAS latency of 15, the module delivers the bandwidth and timing defined by the PC4-17000 specification. Systems that demand faster speeds, lower latencies, or higher densities will not gain those attributes from this part.

How it compares

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

Price $44.99
Cheaper than about 79% 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 $11.25 per GB
Pricier than about 56% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameKingston
Model nameKCP421SS8/4
Total capacity4 GB
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
CAS latencyCL15
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.2 V
Size & build
Shipping weight0.45 kg
Package size152 × 76 × 25 mm

Questions about this item

What speed does the DDR4 2133 SO-DIMM run at in practice?

The module operates at DDR4 2133 (PC4 17000) with CL15 latency at 1.20V.

Will this 260-pin SO-DIMM fit my laptop's memory slot?

It uses the standard 260-pin DDR4 SO-DIMM form factor for compatible notebooks.

How do I install the module and what step is often missed?

Power off, open the compartment, align the notch, press firmly until the side clips click.

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