NvME 1.3 vs NvME 1.4 – What are the differences?


Are you considering upgrading to NvME? If so, you’re making a wise decision. NvME offers many benefits over traditional storage technologies like SATA or SAS. But before you make the switch, it’s important to understand the differences between NvME 1.3 vs NvME 1.4.

1. What is NvME?

NVMe (Non-Volatile Memory Express) is a specification for accessing data stored on PCIe-based SSDs. NVMe was designed from the ground up to take advantage of the unique attributes of flash memory, specifically to optimize performance and reduce latency. The result is a significant improvement in storage performance, making NVMe the ideal choice for enterprise applications that require the highest levels of throughput and efficiency. NVMe is supported by all major flash manufacturers and is now the standard interface for PCIe-based SSDs.

2. NvME 1.3 vs NvME 1.4

The latest version of the Non-Volatile Memory Express (NVMe) specification is version 1.4, which was released in March 2021. Version 1.3 of the specification was released in April 2017. Some of the significant changes in NVMe 1.4 include:

  • Support for Host Memory Buffer Access command set, which allows the host to directly access an NVM device’s memory buffers, reducing latency and CPU overhead.
  • A new End-to-End Data Protection command set, which allows the host to specify that data written to an NVM device should be protected against errors throughout the data path.
  • Enhancements to Passive State Power Management, including a new Host Controlled Thermal Management feature that allows the host to control temperature thresholds and cooling strategies for NVMe devices.
  • Support for Package Symphony Flow Control, which allows multiple NVMe devices to be connected in a daisy-chain configuration with flow control between them.
  • A new Write Error Recovery Notification primitive, which allows the host to be notified if an error occurs during a write operation.

NVMe 1.4 also includes several other minor changes and enhancements.

3. What were the bottlenecks of NvMe 1.3?

NvME 1.3 was created to address the shortcomings of 1.2, which was widely considered to be too slow. 1.3 improved upon 1.2 in several key ways, including increasing the data transfer rate and reducing the latency. However, 1.3 still suffers from some bottlenecks that prevent it from being as fast as possible.

  • One such bottleneck is the use of a serial interface, which limits the speed at which data can be transferred.
  • Another is the lack of support for multiple queues, which can cause delays when multiple commands are issued simultaneously.

Despite these limitations, NvME 1.3 is a significant improvement over 1.2 and is essential for anyone looking to get the most out of their NVMe drive.

6. What are the bottlenecks of NvME 1.4?

The 1.4 revision of the NVM Express specification introduces several new features and capabilities, most notably increased performance thanks to a more efficient command set and greater flexibility in terms of supported form factors and topologies. However, 1.4 also introduces a number of potential bottlenecks that could limit its effectiveness in certain applications.

  • One such bottleneck is the lack of support for multiple simultaneous commands, which can reduce performance in multithreaded workloads.
  • Additionally, 1.4’s reliance on the PCIe bus can introduce latency and jitter issues in some systems.
  • Finally, 1.4’s increased focus on enterprise-class features may make it difficult to adopt in consumer-oriented applications.

Despite these potential challenges, 1.4 remains a powerful and versatile specification that is sure to have a significant impact on the storage industry.

2. What are the benefits of using NvME over traditional storage technologies like SATA or SAS?

NvME (non-volatile memory express) is a new type of storage technology that offers several benefits over traditional storage technologies like SATA (serial ATA) or SAS (serial attached SCSI). One of the biggest benefits of NvME is its speed. NvME drives can achieve speeds of up to 3000 MB/s, which is much faster than the fastest SATA or SAS drives.

This can be a major benefit for applications that require high-speed storage, such as video editing or gaming.

Another benefit of NvME is its low latency.

NvME drives have latencies as low as 30 microseconds, which is much lower than the latencies of SATA or SAS drives. This can be a major benefit for applications that require real-time responses, such as virtual reality or Augmented reality.

Finally, NvME drives are more energy-efficient than SATA or SAS drives. This can be a major benefit for battery-powered devices, such as laptops or smartphones.

4. NvME 1.3 vs NvME 1.4: which version of NvME to use?

In order to understand which version of NvME you need for your environment, it’s important to first understand the different between the two versions.

  • Version 1.0a was released in July 2015 and is the most widely compatible version. It supports PCIe 3.0 and is backward compatible with PCIe 2.0.
  • Version 2.0 was released in March 2017 and supports PCIe 3.1. In addition, it introduces a new feature called AMD Link Power State, which helps to improve power efficiency. So, which version should you choose?
  • If you have a newer system that supports PCIe 3.1, then version 2.0 would be the better choice. However, if you have an older system or one that only supports PCIe 3.0, then version 1.0a would be the better option.

Ultimately, it’s important to choose the version that is best suited for your particular environment.

5. When should you upgrade to the latest version of NvME?

With any software update, it is important to weigh the pros and cons before making the switch. With cloud-based applications, data storage is becoming increasingly important. The non-volatile memory express (NVMe) is the latest storage protocol that offers several benefits over its predecessors. These include lower latency, higher bandwidth, and improved energy efficiency. For these reasons, many businesses are upgrading to the latest version of NVMe.

However, there are a few things to consider before making the switch.

  • First, compatibility issues may arise with older devices or operating systems.
  • Second, the learning curve for new users can be steep.
  • Finally, the cost of upgrading can be significant. As with any major decision, it is important to carefully consider all factors before upgrading to the latest version of NVME.


NvME drives offer several benefits over traditional storage technologies like SATA or SAS, including speed, low latency, and energy efficiency. However, before making the switch to NvME it is important to consider compatibility issues and the cost of upgrading. Ultimately, it is important to choose the version of NvME that is best suited for your particular environment.

I am a computer engineer holding a bachelor's degree in Computer Science, complemented by a Master's in Business Administration from University of Strathclyde, Scotland. I currently work as a Senior IT Consultant in Melbourne, Australia. With over 15 years of...