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Green printed circuit board with black memory chips, 288 gold pins along the bottom edge, no heat spreader

Kingston Technology Corp.

Kingston Technology Corp. KCP421NS8/4 4GB DDR4 2133 288-pin DIMM memory upgrade

SKU CH-6SB9-7YRX4 MPN KCP421NS8/4

4 GB DDR4 2133 MHz DIMM upgrade for select Dell, HP, Lenovo and Fujitsu desktops

  • Total capacity4 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • Product type288-Pin DDR4 SDRAM
  • 4GB capacity adds responsive multitasking headroom
  • DDR4 2133 speed matches PC4-17000 system spec
  • 288-pin DIMM fits standard desktop motherboard slots
  • Validated for listed Dell OptiPlex and Precision desktops
  • Compatible with select HP EliteDesk and Lenovo ThinkCentre models

System-Specific DDR4 Upgrade

This 4 GB DDR4 module is built for select Acer, Dell, Fujitsu, HP and Lenovo desktops. It targets owners of listed workstations and towers who need a straightforward capacity increase without changing memory generation.

Thermals and Power Profile

The stick has no heat spreader and runs at the standard DDR4-2133 speed with a PC4-17000 rating. In normal desktop workloads it operates within the platform's default voltage and thermal envelope, adding no audible noise and drawing only the power required by the JEDEC specification.

Sustained Load Behaviour

Under continuous memory-intensive tasks the module maintains its rated 2133 MHz frequency without throttling. The bare PCB design relies on the system's existing airflow, so stability depends on the host chassis providing adequate case ventilation for the memory slots.

How it compares

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

Price $34.99
Cheaper than about 83% 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 $8.75 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

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Specifications

Product
Brand nameKingston
Model nameKCP421NS8/4
Total capacity4 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
Heat spreaderNo
Size & build
Shipping weight0.45 kg
Package size152 × 76 × 25 mm

Questions about this item

How do I install this 288-pin DDR4 DIMM and what step is often missed?

Power off the PC, open the case, align the notch on the module with the slot key, press firmly until both retention clips click shut, then verify 2133 MHz in BIOS.

What maintenance or replacement will this 4 GB DDR4-2133 module need later?

No scheduled maintenance; if capacity becomes limiting, add a matching 288-pin DDR4 DIMM or replace with higher-capacity DDR4 modules.

What limit appears first under sustained use with this PC4-17000 memory?

The 4 GB capacity is the first constraint; bandwidth and latency remain within DDR4-2133 specification during continuous operation.

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