Understanding the Different Types of SSDs — Matrix Warehouse Buyer’s Guide

If you're upgrading a laptop or desktop, you’ve likely seen terms such as SATA, NVMe, Gen3, Gen4, M.2 and external SSDs. They all promise better speed, but the differences can be confusing. This guide breaks down each SSD type clearly so you can choose the right upgrade with confidence.

Matrix Warehouse has supplied computer components and SSD upgrades to South Africans for over 20 years. Our technicians work with these storage devices daily, giving us real-world insight into performance, compatibility and reliability.

1. SATA SSD – Reliable & Compatible with Older Systems

SATA SSDs are the most common upgrade for older laptops and desktops. They replace slow mechanical hard drives and deliver instant responsiveness.

• Typical speed: 500–550 MB/s
• Works with most laptops/desktops made before 2017
• Affordable and easy to install
• Browse all SATA SSDs

2. M.2 SATA SSD – Compact but Same Speed

M.2 SATA SSDs look similar to NVMe drives but run at the same speed as normal SATA SSDs. They are ideal for slim laptops that have an M.2 slot but don’t support NVMe.

• Same performance as 2.5” SATA SSDs
• Uses a B+M key connector
• Perfect for older ultrabooks

3. NVMe SSD – The Modern High-Speed Upgrade

NVMe SSDs use PCIe lanes instead of SATA. This allows dramatically faster speeds, instant boot times and improved productivity. Shop NVMe SSDs

NVMe Gen3

Affordable, fast and widely compatible.

Speed: ±2,000–3,500 MB/s

NVMe Gen4

High-performance storage for gaming PCs, PS5 upgrades and professional workloads such as 4K video editing.

Speed: ±4,000–7,400 MB/s

NVMe Gen5

Cutting-edge SSDs designed for workstation-grade performance. These drives often require dedicated cooling.

Speed: 10,000 MB/s and higher

4. External / Portable SSDs

External SSDs connect via USB-C and offer fast, portable storage for backups, travel, console libraries and media creators.

• USB 3.2 Gen2: ±1,050 MB/s
• USB 3.2 Gen2x2: ±2,000 MB/s
• Shock-resistant and lightweight

5. Which SSD Should You Choose?

Your Need	Recommended SSD Type
Upgrading an older laptop/PC	SATA SSD
Everyday speed & reliability	NVMe Gen3
Gaming PC or PS5 upgrade	NVMe Gen4
4K/8K editing & pro workloads	NVMe Gen4 / Gen5
Portable storage & backups	USB-C External SSD

6. Checking Compatibility

Before buying an SSD, confirm:

• Your laptop/PC model and age
• The type of slot available (SATA, M.2 SATA, NVMe)
• Supported PCIe version (Gen3, Gen4, Gen5)
• Whether a heatsink is required (PS5 & NVMe Gen5)

Matrix Warehouse technicians can help you determine the correct SSD for your device—simply provide your laptop or PC model.