9 September 2025
updated at: 17 October 2025
7 min
In today's high-tech world, data performance and processing speed are key to business success and IT efficiency. The Non-Volatile Memory Express (NVMe) architecture is an innovative protocol for working with solid-state drives (SSDs) that significantly outperforms traditional SATA and SAS interfaces. In this article, we will take a closer look at the advantages of NVMe, explore its operation and practical benefits, including on the Russian market. We will also analyze the comparison of SATA and NVMe, SAS and NVMe, consider usage scenarios and cases of savings on servers.
Non-Volatile Memory Express (NVMe) is a modern interface designed specifically for SSDs that provides a fundamentally new architecture for memory and data transfer. Unlike legacy SATA and SAS interfaces, originally created for mechanical hard disk drives based on the AHCI protocol, NVMe allows you to unlock the full potential of flash memory and achieve significant performance gains.
The key advantages of NVMe - it is many times faster data transfer speed, multi-channel processing requests, low latency and efficient use of processor resources. Thus, NVMe speed in modern devices reaches 5000 MB/s, which is significantly higher than SATA (~550 MB/s) or SAS (~1500 MB/s). This can significantly increase data center processing speeds, reduce application response times, and reduce costs due to the high density and efficiency of server SSDs.
Today's data centers (DCs) and cloud platforms require performance solutions that can handle massive amounts of data with minimal latency. NVMe enables you to:
Deliver millions of input/output operations per second (IOPS)
Reduce response times to 10-50 microseconds
Support thousands of parallel commands through deep request queuing
Reduce CPU overhead with a simplified architecture
SATA and SAS technologies were created and optimized for mechanical HDDs in an era of low speed and low concurrent operations. This is especially true for the AHCI protocol used in SATA drives.
Instruction queue depth is limited to 32 requests, which significantly constrains parallel processing
Additional CPU computational resources are required to process I/O operations
Intermediate protocols create overhead and latency
Data transfer rates are limited to ~600 MB/s (SATA) and ~1500 MB/s (SAS)
The SAS interface is focused on more reliable and faster server disk connectivity, but:
The architecture and protocols are still inherited from the mechanical era, making it unable to compete with NVMe in scalability and speed
Support for up to a few hundred concurrent requests - less than NVMe with its thousands of queues
Higher cost compared to SATA, but significantly lag behind in performance metrics
The NVMe protocol is specifically designed to match the capabilities of solid state NAND memory to maximize access and request processing.
Utilizes a direct connection to the PCIe bus (often PCIe Gen3 or Gen4 with bandwidths up to 32 Gbps or higher)
No intermediate software layers or controllers to reduce speed and increase latency
Model with support for tens of thousands of parallel queues, where each queue can contain up to 64 thousand instructions
Significant reduction in CPU load compared to AHCI
SSD stores data in NAND memory chips, providing minimal access latency unlike spinning HDDs. To unlock the potential of SSDs, an efficient communication protocol, NVMe, is essential.
SATA SSDs are limited by the bandwidth of the SATA interface (~550 MB/s)
SAS SSDs provide about 1500 MB/s on average
M.2 NVMe SSDs connect over PCIe and achieve speeds of up to 5 GB/s and higher, as well as minimal latency and high multi-threading performance
| Advantage | Description |
|---|---|
| NVMe speeds | Up to 3500-5000 MB/s, which is 5-10 times faster than ssd sata speeds |
| Minimal latency | Response time 10-50 microseconds vs. 100-150 for SATA and SAS |
| Multi-channel processing | Support thousands of queues simultaneously |
| Reduced CPU load | Simplified protocol reduces computational overhead |
| Saves resources and space | Reduce the number of servers due to high data density |
| Competitive cost | NVMe drives cost comparable to SAS, but higher than SATA |
Diagram 2: NVMe vs SATA vs SAS performance by IOPS and latency. A huge difference in favor of NVMe can be seen.
Modern drives utilize different types of memory that determine quality, speed, and endurance:
SLC (Single-Level Cell): high speed and reliability, but expensive and low capacity.
MLC (Multi-Level Cell): balance between cost and performance.
TLC (Triple-Level Cell): high storage density, moderate speed.
QLC (Quad-Level Cell): maximum density and low cost, inferior in speed and capacity.
NVMe SSDs often utilize TLC and QLC, and the NVMe interface offsets the memory speed limitation for high overall performance.
Modern server NVMe SSDs are equipped with:
ECC (error correction)
Wear Leveling (even write distribution)
Power Loss Protection
Status Monitoring (SMART, Telemetry)
This ensures long life and high reliability under intensive operations.
| Interface | Maximum speed | Latency (microsec) | Features |
|---|---|---|---|
| SATA III | 600 MB/s | 100-150 | Old standard for HDDs, limited for SSDs |
| SAS | ~1500 MB/s | 100-120 | Server disk, higher reliability |
| NVMe over PCIe | Up to 5000 MB/s | 10-50 | Direct connection to processor, multi-channel |
| Parameters | SSD SATA | SSD NVMe |
|---|---|---|
| Read speed | up to 550 MB/s | 3500-5000 MB/s |
| Latency | 100-150 µs | 10-50 µs |
| Interface | SATA III | PCIe Gen3/4 |
| Form factor | 2.5", M.2 | M.2, U.2, PCIe |
| Price per 1TB | Lower | Above |
NVMe is becoming the standard for high-load systems due to its scalability and speed. SAS continues to be used in tasks with critical reliability at moderate performance settings, but is inferior to NVMe in speed and scalability.
Russian companies note the key advantages of NVMe:
Banks reduce transaction delays, improving service quality
IT-companies reduce the number of servers and energy costs, increasing computing performance
Virtualization (VMware, Hyper-V, vStack) on NVMe increases virtual machine responsiveness, reducing latency and increasing deployment density
Table: Comparison of virtualization platforms by NVMe performance
| Platform | NVMe features | Advantages |
|---|---|---|
| VMware | Maximum access speed | Minimal latency, high scalability |
| Hyper-V | Easy management | Good integration and stability |
| vStack | Hybrid clouds and multi-tenant | Optimize resources in hybrid environments |
NVMe is the architecture of the future for efficient and scalable storage. It aims to improve performance, reduce costs and support new digital services.
Want to improve the efficiency of your IT landscape with NVMe? Ask a presale question via the feedback form below and see how our solutions can help your business!
What is NVMe?
It is a protocol for high-speed SSDs optimized for PCIe and flash memory.
How is NVMe better than SATA?
NVMe provides up to 10x faster speeds and 10x lower latency.
Can I use SATA SSDs in a server?
You can, but for highly loaded systems it is better to use NVMe for guaranteed performance.
NVMe - Non-Volatile Memory Express
SATA - Serial ATA
SAS - Serial Attached SCSI
PCIe - Device Connection Bus
M.2 NVMe SSD - Compact NVMe drive in M.2 form factor
For more useful information and comparisons, check out our articles on NVMe technologies and server solutions.
If you are interested in upgrading your data center to NVMe - contact us for a free audit and demonstration of modern drives' capabilities!
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