How to Choose the Right SSD in 2026

Upgrading to an SSD is the single biggest performance boost you can give an older PC, and choosing the right one for a new build matters more than ever. With prices continuing to fall, the question isn't whether to buy an SSD — it's which one.

SATA vs NVMe: Does the Interface Matter?

SATA SSDs connect through the same interface as traditional hard drives. They top out at roughly 550 MB/s — fast enough for general use, but a bottleneck for large file transfers or heavy multitasking.

NVMe SSDs plug into an M.2 slot and communicate over PCIe. A Gen 4 NVMe drive delivers around 7,000 MB/s sequential reads — over 12x faster than SATA. Gen 5 pushes past 10,000 MB/s, though real-world gains over Gen 4 are marginal for most users.

When SATA Still Makes Sense

• Older motherboards without M.2 slots
• Budget builds where every pound counts
• Secondary storage drives where speed is less critical

TLC vs QLC: The Flash Type Trade-Off

The NAND flash type affects endurance, speed, and price:

• TLC (Triple-Level Cell) — 3 bits per cell. The mainstream sweet spot with good endurance and performance.
• QLC (Quad-Level Cell) — 4 bits per cell. Cheaper per GB but slower writes and lower endurance. Fine for read-heavy workloads.

For a boot drive or primary storage, stick with TLC. QLC works well for bulk game storage or media libraries where you're mostly reading data.

DRAM Cache: The Hidden Differentiator

A DRAM cache stores the drive's mapping table in fast memory, keeping performance consistent under sustained workloads. Budget drives skip the DRAM cache (DRAM-less) and use Host Memory Buffer (HMB) instead — borrowing a small slice of system RAM.

For a boot drive, prefer a drive with DRAM cache. For a secondary storage drive, DRAM-less is perfectly fine.

How Much Capacity Do You Need?

Use Case	Recommended Size
Boot drive + core apps	500 GB – 1 TB
Gaming library	1 TB – 2 TB
Content creation	2 TB – 4 TB
Budget build (minimum)	256 GB

Prices per GB continue to drop, so buying more capacity now often costs less than adding a second drive later.

Key Specs to Compare

1. Sequential read/write speeds — headline numbers, most useful for large file transfers
2. Random 4K IOPS — better indicator of real-world responsiveness
3. TBW (Terabytes Written) — endurance rating, higher is better
4. Warranty length — 5 years is standard for quality drives

Bottom Line

For most PC builders in 2026, a 1 TB Gen 4 NVMe TLC drive with DRAM cache hits the sweet spot of price, performance, and endurance. Check our storage price tracker to find the best current deals on Amazon UK.