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Green circuit board with black memory chips and gold edge connector

A-Tech

A-Tech 8GB DDR4 2133MHz CL15 260-Pin SODIMM 1Rx8 Kingston KCP421SS8/8 KVR21S15S8/8 KVR21S15S8K2/16 Laptop RAM

SKU CH-8557-H7AFC

8GB DDR4 2133MHz CL15 1Rx8 SODIMM replacement for Kingston KCP421SS8/8, KVR21S15S8/8, KVR21S15S8K2/16 laptop memory

  • Total capacity8 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Recommended forAMD & Intel Compatible
  • Boosts multitasking with 8GB DDR4 2133MHz capacity
  • CL15 latency sharpens data access speed
  • 20V operation cuts power draw and heat
  • 260-pin SODIMM fits standard laptop slots
  • Major-brand chips ensure reliable long-term performance

Laptop DDR4 SODIMM upgrade

This 8 GB DDR4 module fits 260-pin SO-DIMM slots in laptops, notebooks and all-in-one PCs. It runs at 2133 MHz with CL15 latency and standard 1.2 V power. Major-brand chips are tested for dependable operation in both AMD and Intel platforms.

Replaces Kingston KCP421SS8/8 equivalents

The module is a direct drop-in for Kingston part numbers KCP421SS8/8, KVR21S15S8/8 and the dual-channel kit KVR21S15S8K2/16. The upgrade is worthwhile when the system currently has 4 GB or a single slower stick and the motherboard supports DDR4 2133 speeds.

8 GB single-rank capacity

One 1Rx8 module provides enough headroom for everyday multitasking, web browsing and office applications. Memory-intensive workloads such as large video projects, virtual machines or heavy creative suites will exceed the available space and require additional modules or higher-density kits.

How it compares

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

Price $41.99
Cheaper than about 64% of the 2,079 comparable items (median $70.99).
Total capacity 8 GB
Lower than about 60% of the 1,886 comparable items (median 16 GB).
Price per GB $5.25 per GB
Cheaper than about 60% of the 1,886 comparable items (median $5.94 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 nameA-Tech
Total capacity8 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
Compatibility
Recommended forAMD & Intel Compatible

Questions about this item

Will this 260-pin DDR4 SODIMM fit my laptop's memory slot?

Yes, the 260-pin DDR4 SO-DIMM form factor matches the standard slot used in most laptops supporting DDR4 2133 MHz memory.

Do I need to configure anything in BIOS after installing this 1.20V module?

No, the module runs at standard 1.20V DDR4 voltage and CL15 timings, so most systems detect and apply the correct settings automatically.

When should I consider replacing this 8GB DDR4 module?

Replace it if you experience frequent crashes, memory errors during diagnostics, or if your workload consistently exceeds 8GB capacity.

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