Joybuy Insights

Buying a 1TB M.2 NVMe SSD: what to consider for speed, compatibility and durability

A 1TB M.2 NVMe SSD can help a desktop PC, laptop or mini PC access files, programmes and games much faster. However, a high MB/s rating doesn’t automatically mean a drive is right for your system. The key factors are the interface, form factor, cooling and how you plan to use it.

When buying an internal 1TB SSD, three common mistakes are worth avoiding:

  • Not checking the PCIe generation: A PCIe 5.0 SSD will usually work in an older slot, but won’t reach its advertised maximum speed.
  • Overestimating sequential speeds: High figures for reading large files don’t tell you much about lots of small system operations or game installations.
  • Ignoring cooling and clearance: High-performance NVMe SSDs can get warm under sustained load. For a laptop or PlayStation 5, you’ll also need to check whether a heatsink is required and whether there’s enough space.

The key specifications of a 1TB M.2 NVMe SSD

1. Interface: PCIe 3.0, PCIe 4.0 or PCIe 5.0

The PCIe generation, together with the number of lanes, determines the theoretical bandwidth. A PCIe 4.0 SSD with an x4 connection is a well-balanced choice for many gaming PCs, work computers and recent laptops. Models such as the Lexar NM790 and KIOXIA EXCERIA PLUS G4 use PCIe 4.0 x4.

A PCIe 5.0 SSD can reach much higher transfer speeds, but requires a compatible M.2 slot and suitable heat dissipation. It will generally work at reduced speeds on a PCIe 4.0 motherboard. So, check your motherboard manual or laptop specifications before you buy.

2. Form factor: M.2 2280 doesn’t fit every device

The M.2 2280 designation refers to a width of 22 mm and a length of 80 mm. This form factor is common in desktop PCs and many laptops, but it still needs to match the M.2 slot in your device.

It’s also important to check whether the slot supports NVMe over PCIe. An M.2 slot for SATA SSDs isn’t automatically compatible with an NVMe SSD. For compact devices, check the maximum clearance too, particularly if the SSD has an integrated heatsink.

3. Write endurance, cache and temperature

For gaming and everyday applications, solid read and write speeds are usually enough. Content creators, developers and professional users should also check TBW (the manufacturer’s stated write endurance) and temperature limits.

An SLC cache can provide high write speeds for short periods. However, speeds may drop once the cache is full, especially when writing very large amounts of data continuously. Figures such as 600 TBW or 750 TBW are manufacturer ratings and serve as a guide, but they’re no substitute for a backup. Always keep an additional copy of important files.

Our picks for different users

Suitable for: Budget-conscious beginners
Lexar NM620 1TB M.2 NVMe Internal SSD

Lexar NM620 1TB M.2 NVMe Internal SSD

Why it suits this user: This PCIe 3.0 x4 SSD is a good fit for compatible PCs and laptops when you’re looking for a solid storage upgrade without a PCIe 5.0 platform.

How it helps you avoid a common pitfall

Its clearly stated PCIe 3.0 interface means you won’t pay for PCIe 5.0 performance that your system can’t support.

Key benefits and strengths

M.2 2280, read speeds of up to 3,300 MB/s, write speeds of up to 3,000 MB/s and 500 TBW according to the product information.

Suitable for: Buyers who expect top quality
Lexar NM790 1TB M.2 NVMe Internal SSD

Lexar NM790 1TB M.2 NVMe Internal SSD

Why it suits this user: This PCIe 4.0 SSD is designed for users who need fast transfer speeds for games, large projects and demanding applications.

How it helps you avoid a common pitfall

Its PCIe Gen4 x4 connection is suited to systems that support this platform. The integrated heatsink helps manage heat under heavy loads.

Key benefits and strengths

Read speeds of up to 7,400 MB/s, write speeds of up to 6,500 MB/s and random read performance of up to 1,000,000 IOPS according to the manufacturer.

Suitable for: Specialist uses and heavy users
Lexar ARES PRO 1TB Gen5 NVMe M.2 SSD

Lexar ARES PRO 1TB Gen5 NVMe M.2 SSD

Why it suits this user: This model is suited to current desktop systems with PCIe 5.0, handling large file transfers, video editing and performance-intensive applications.

How it helps you avoid a common pitfall

Maximum performance requires a PCIe 5.0 slot and suitable cooling. Check that your system meets these requirements before buying.

Key benefits and strengths

PCIe 5.0 x4, read speeds of up to 14,000 MB/s, write speeds of up to 7,500 MB/s and 750 TBW according to the product specifications.

Suitable for: Gaming and laptop upgrades
KIOXIA EXCERIA PLUS G4 1TB SSD M.2 2280

KIOXIA EXCERIA PLUS G4 1TB SSD M.2 2280

Why it suits this user: This M.2 2280 SSD is designed for compatible gaming PCs and systems that need fast PCIe 4.0 storage.

How it helps you avoid a common pitfall

Its single-sided design may make it easier to fit in compatible devices. Before using it as an SSD for PS5, check the installation dimensions, firmware and whether a suitable heatsink is fitted.

Key benefits and strengths

PCIe 4.0 x4, read speeds of up to 7,300 MB/s and write speeds of up to 6,400 MB/s according to the product description.

Looking for more options?

We’ve put together a complete, regularly updated range of products that meet these strict selection criteria and the safety regulations in force across the EU.

Installation and use: what to keep in mind

  1. Check compatibility: Consult the manual to confirm the M.2 format, NVMe support and PCIe generation.
  2. Make sure it’s properly cooled: Use the motherboard heatsink or a compatible alternative if the SSD manufacturer recommends one.
  3. Switch off before installation: Shut down the PC completely, unplug it and take care to avoid electrostatic discharge.
  4. Set it up after installation: In Windows, this is usually done through Disk Management. You can then format and partition the SSD.
  5. Plan for backups: An internal PCIe SSD is no substitute for keeping an additional backup.

Frequently asked questions about 1TB M.2 NVMe SSDs

Is an NVMe SSD noticeably faster for gaming?

When starting the operating system, copying large files and during certain loading processes, an NVMe SSD can offer shorter access times than older SATA drives. Actual gaming performance also depends on your processor, graphics card, memory and game software.

How long does a 1TB NVMe SSD last?

Lifespan depends on write volume, temperature, power supply and usage. Manufacturers provide ratings such as TBW or MTBF as a guide. These figures don’t give an exact lifespan, so regular backups are still essential.

How much power does it use?

An M.2 SSD doesn’t need a separate power supply. Power consumption depends on the model and workload. PCIe 5.0 models can produce more heat under heavy loads and may need better cooling. This can increase the cooling requirements for your case fans and motherboard heatsink.