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Cheap SSD vs expensive SSD: what is the real difference?
Short answer: an expensive SSD (for example a Kingston data-center model at about $132 for ~1 TB) is built to read and write 24/7 with constant latency, while a basic SSD of the same size (about $50, like the Kingston A400) is slower and won't last as long under heavy use. For browsing, email, Word and Excel the cheap one works; for servers, NAS, RAID or 4K video recorders, buy the drive the manufacturer lists as compatible.
Same capacity, very different price
On Amazon I compared two Kingston drives of roughly 1 TB (960 GB): a data-center model (DC series) at about $132 and the A400 at about $50, less than half the price. Other brands (Crucial and so on) follow the same pattern: one line made for data centers and one for regular computers.
What you pay for in a data-center SSD
- Endurance: the chips are made to handle constant reading and writing. A regular SSD has a limit; if you abuse it, it won't last very long.
- Steady latency: consistent, quick response time (quality of service), which matters for servers.
- Use cases: virtualization, high-speed databases, media streaming, servers running 24/7.
Speed: a few numbers from the spec sheets
In the spec sheets I showed, the data-center model reads at about 555 MB/s and writes at about 520 MB/s, while the basic model is around 500 MB/s read and 450 MB/s write. It's slower and its latency isn't as good, but it costs almost three times less.
How to tell them apart when shopping
Read the product page and the manufacturer's website, not only the price. The data-center drive is described with terms like enterprise, mixed use, end-to-end data protection and quality of service, and it lists server workloads as its use cases. The basic model is described for everyday computers. Model numbers change over the years, but the idea stays the same: one product line is made to be used 24/7 in data centers and the other is made for regular computers. If you watch this in 20 years, the difference will be kind of the same.
Also compare the read and write speeds and the latency in the spec sheet. Two drives can both say 1 TB, but the one made for heavy work will keep its speed and response time when it is busy all day.
Always check the compatibility list
Devices like 4K video recorders (I record my videos to one) and NAS servers such as QNAP publish a compatibility list. With a slow or unlisted drive you can get dropped frames when recording, or drives that don't sync properly in a RAID/mirror, and you can lose data. For a business, follow the manufacturer's list. Otherwise you become the guinea pig, and I don't want to spend time testing drives I'm not paid to test.
Which one should you buy?
If your customer only browses the internet, reads the news, a few emails, Word and Excel, the cheaper SSD works. I've done it with most of my customers. If the drive goes into a server, NAS, video recorder or any critical workload, buy the one that is sure to work and gives the highest performance.
Buying from outside the US
I'm in the US. If you need a drive, electronics or tools and you can't get them where you live, message me and I can send them with DHL, FedEx or whatever works for you. If you're in the US, the links are in the video description so you can buy them yourself.
Frequently asked questions
Is a cheap SSD good enough for a home computer?
Yes, for light use like browsing, email, Word and Excel a basic SSD works fine.
Why are data-center SSDs more expensive?
They are designed for 24/7 reading and writing, higher endurance and constant low latency for servers and databases.
Can I use a cheap SSD in a NAS or video recorder?
It may work, but you risk dropped frames, RAID sync issues or data loss. Use a drive from the manufacturer's compatibility list.
Does the brand matter?
The same split exists across brands such as Kingston and Crucial: a data-center line and a regular line.