What is NVMe M.2 Solid State Drive?

What is NVMe M.2 Solid State Drive?

What is NVMe? What is SATA?

NVMe (Non-Volatile Memory Express):

- NVMe is an interface protocol used to connect flash storage devices, specifically designed for Solid State Drives (SSDs).

- It utilizes the PCIe bus to achieve extremely high read/write speeds and low latency, supporting multi-channel parallel processing, making it suitable for high-performance computing applications.


SATA (Serial ATA):

- SATA is an interface protocol used to connect storage devices such as hard drives and SSDs.

- It provides a lower transfer rate, with a maximum of 6 Gb/s, originally designed to provide connection and data transfer solutions for mechanical hard drives.


Comparison Chart: NVMe vs SATA





Full Name

Non-Volatile Memory Express

Serial Advanced Technology Attachment

Launch Year



Design Purpose

Designed for flash storage

Originally designed for mechanical hard drives

Transfer Rate

Up to 32 Gb/s (PCIe 4.0 x4)

Up to 6 Gb/s (SATA III)

Interface Type

PCIe (typically M.2, U.2, PCIe card)

SATA interface (typically 2.5", 3.5")

Data Channels

Multi-channel parallel processing (up to 65,536 command queues)

Single-channel serial processing (up to 32 command queues)


Extremely low (microseconds level)

Higher (milliseconds level)

Power Consumption

Higher (for high-performance computing)

Lower (suitable for general computing)

Application Scenarios

High-performance NAS, suitable for enterprise-level applications requiring high concurrency and high throughput

General NAS, suitable for home and small office storage needs





Requires NVMe-supported motherboard and firmware

Broad compatibility, suitable for most NAS devices


Supported (some models)



Generally lower capacity but high performance

Higher capacity and cost-effective


Requires better cooling solutions

Lower cooling requirements


High (suitable for frequent read/write operations)

Moderate (suitable for general storage and backup)


High-speed transfer, low latency, high parallel processing capability

Low cost, good compatibility, large capacity


Higher cost, higher power consumption, requires good cooling

Lower transfer rate and performance


For enterprise-level NAS requiring high performance and low latency, NVMe is the better choice, while for cost-sensitive and basic needs of home and small office NAS, SATA is a more cost-effective option.


*PCIe Gen 3 X 2 means it have 2 lanes & PCIe gen 3 X 4 means it have 4 lanes.

More(double) lanes means more(double) speed.*


Advantages of NVMe SSDs


  1. High-Speed Transfer:

   - Utilizing PCIe Bus: NVMe directly transmits data through the PCIe bus. Under the current PCIe 4.0 standard, a single lane can achieve a transmission rate of up to 8 Gb/s, and a four-lane (x4) configuration can reach up to 32 Gb/s, several times faster than the traditional SATA III (6 Gb/s).

   - Breaking Bottlenecks: Compared to SATA interfaces, NVMe can more fully exploit the speed advantages of NAND flash memory, avoiding transfer rate bottlenecks.


  1. Low Latency:

   - Simplified Protocol Stack: NVMe protocol simplifies drivers and command sets, reducing data transmission latency, typically down to microsecond levels.

   - Efficient Command Processing: Due to the optimized design of the NVMe protocol, data commands can be transmitted and processed more quickly, significantly enhancing system response speed.


  1. High Parallel Processing Capability:

   - Multiple Command Queues: NVMe supports up to 65,536 concurrent command queues, with each queue handling up to 64,000 commands. This greatly enhances data parallel processing capability, suitable for multi-task and high-load environments.

   - Multi-Core Processing Optimization: NVMe can better utilize the advantages of multi-core processors, achieving higher parallel processing efficiency.


  1. Higher IOPS (Input/Output Operations Per Second):

   - High Performance: Due to NVMe's high bandwidth and low latency characteristics, its IOPS performance is significantly higher than that of SATA interfaces, suitable for large-scale applications requiring fast data access and processing, such as databases, virtualization environments, and real-time data analysis.


  1.  Miniaturization and Flexibility:

   - M.2 Specification: NVMe devices commonly use the M.2 interface. This compact design is suitable for ultra-thin laptops and other compact devices, saving space and providing flexible installation options.

   - U.2 and PCIe Cards: In addition to M.2, NVMe also supports U.2 and PCIe card forms, suitable for various servers and workstations, providing more installation flexibility and expansion options.


  1. Enterprise-Level Reliability and Durability:

   - Durability: NVMe SSDs generally have higher write durability, suitable for frequent data write and read operations, meeting enterprise application needs.

   - Advanced Features: Many NVMe SSDs support advanced features such as power loss protection, data encryption, and error correction codes (ECC), further enhancing data security and reliability.



In today's data-driven world, storage performance and efficiency are crucial. The Aiffro K100 significantly enhances data read/write speed and system response time while offering excellent energy efficiency and durability, making it an ideal choice for enterprise-level and high-performance computing environments. By supporting 4 x 2280 M.2 NVMe PCIe Gen32 SSD slots, the All-SSD NAS K100 fully leverages the numerous advantages of NVMe, including high-speed transfer, low latency, and high parallel processing capability, meeting the growing storage needs. For more details, please visit the AIFFRO product page.


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