SSD and NVMe drives store data the same way — in flash memory, with no moving parts. What differs is how they talk to the rest of the computer. A SATA SSD uses a standard originally designed for spinning hard drives, while NVMe connects flash memory directly to the fast PCI Express bus. In practice, this means shorter data access times, and in hosting it shows up most on sites that read hundreds of small files and query the database repeatedly on every visit.
How do digital storage devices like NVMe and SSD work?
A traditional hard disk drive (HDD) writes data magnetically onto spinning platters, and the read/write head has to physically move to the right spot. Every read from a different part of the disk means a few milliseconds of waiting. Solid-state drives — SSD and NVMe — have no moving parts: data sits in NAND flash memory cells and is read electronically. Access time is the same no matter where the data is, and latency drops to a fraction of a millisecond.
This difference is most noticeable where a system needs to grab many small pieces of data at once — exactly how a web server running WordPress, an online store, and a database operates.
What are SSDs and how do these electronic storage devices work?
An SSD (Solid State Drive) is a storage device built from flash memory chips and a controller that manages writing, reading, and wear-leveling across the cells. The same NAND technology runs in USB flash drives, memory cards, and smartphones. A classic SSD connects to the computer over SATA — an interface that let people simply swap a hard drive for a faster one without changing anything else in the hardware.
SATA itself is the bottleneck. Its latest version has a throughput of 6 Gb/s, which works out to around 550 MB/s in practice. The AHCI protocol that a SATA drive uses to talk to the system supports a single queue with up to 32 commands — once there are more requests than that, the drive works through them one at a time.
What is NVMe, and what makes it different?
NVMe (NVM Express) isn't a different type of memory — it's a communication protocol published in 2011 and designed from the ground up for flash memory. An NVMe drive is, in practice, an SSD connected to the PCI Express bus — the same bus graphics cards use — instead of to a SATA connector.
That brings two advantages. The first is throughput: modern NVMe drives on PCIe 4.0 read data at speeds up to around 7 GB/s — more than ten times faster than a SATA SSD. The second, more important for a server, is parallelism: NVMe supports up to 65,535 queues, each holding thousands of commands. When many people visit a site at the same moment, their requests don't wait in a single queue — they're handled in parallel.
What are the pros and cons of SSD and NVMe?
A SATA SSD still has its place. It's cheaper for the same capacity and fits in almost any computer, and for everyday office work — a browser, documents, email — the difference compared with NVMe can be barely noticeable.
Advantages of a SATA SSD:
- lower price per gigabyte
- compatible with almost any motherboard and case
- more than enough for typical office work
Advantages of NVMe:
- throughput many times higher than SATA
- shorter data access times
- parallel handling of many requests at once
- stable performance under heavy load
The downside of NVMe is a higher price, plus the fact that its advantage disappears when something else is the bottleneck — for example, the network link when copying large files over FTP, or poorly optimized site code. A fast drive won't fix a plugin that runs hundreds of unnecessary database queries on every page load.
What does this mean when choosing hosting?
For a server, a website mainly means a huge number of small reads: PHP files, templates, images, cache, and database queries on every visit. That's exactly the kind of workload where NVMe has the biggest edge over SATA. That's why all our plans — from SSD NVMe hosting for business websites to WordPress hosting — run exclusively on NVMe drives.
The drive is the foundation, but it's not the whole answer. If a site is slow despite running on a fast server, the cause usually lies in the site itself — and you can check that with the free test below.