2-power 2P-KVR21S15S8/4 - 4 GB - 1 x 4 GB - DDR4 - 2133 MHz

When a laptop starts to lag during multitasking, a memory upgrade can bring it back to life. The 2-POWER 2P-KVR21S15S8/4 is a 4GB DDR4 SODIMM module that fits most notebooks and small-form-factor systems, giving them the extra headroom needed for smoother web browsing, office applications, and light photo editing. With a clock speed of 2133MHz and a CAS latency of 15, it delivers reliable performance without excessive power draw.

Key specifications

• Capacity: 4 GB (1 x 4 GB module)
• Memory type: DDR4 SDRAM
• Speed: 2133 MHz (PC4-17000)
• CAS latency: CL15
• Form factor: 260-pin SODIMM
• Voltage: 1.2 V
• Rank: Single rank (1Rx8)
• ECC: Non-ECC, unbuffered
• Module configuration: 512M x 64
• Application: Laptop / Notebook

Why choose it

This module is engineered for compatibility and stability. Its low 1.2V operating voltage helps reduce heat and extend battery life in portable devices. The unbuffered, non-ECC design matches the requirements of most consumer laptops, ensuring plug-and-play installation. A single-rank layout can also improve compatibility with certain chipsets compared to dual-rank modules.

Ideal use cases

• Upgrading an older laptop to run Windows 10 or 11 more comfortably
• Adding memory to a mini PC or thin client for office productivity
• Replacing a failed SODIMM in a notebook
• Building a compact system where low power consumption is a priority

Good to know

The 2P-KVR21S15S8/4 follows JEDEC standard timings, so it will run at the highest speed supported by both the module and the host system. If your laptop's chipset supports only 1866MHz or 1600MHz, the module will automatically downclock accordingly. Always verify your device's maximum supported memory capacity and speed before purchasing. No heat spreader is included, which is typical for standard SODIMMs and ensures a low profile for tight notebook chassis.