The Real Story
For most people, the Samsung 990 Pro 2 TB (PCIe 4.0) remains the best buy in 2026. PCIe 5.0 drives are faster on paper, slower on power, and add real heat to your system for performance gains that you cannot perceive in normal use. Save the money.
How We Tested
Beyond synthetic benchmarks, we ran real-world tests: actual Windows boot times, game load times across 8 titles, large file copies, and a sustained 4K video editing workload. We monitored thermals over hours of sustained use, and ran an accelerated endurance simulation to estimate write-amplification factor.
PCIe 4.0 — Where Most People Should Stop
The fastest PCIe 4.0 SSDs (Samsung 990 Pro, WD SN850X, Crucial T500) all max out around 7,000 MB/s sequential read. In real-world tasks — booting Windows, launching games, opening documents — they perform identically to PCIe 5.0 drives at 50% of the cost, 60% of the power, and 70% of the heat.
The 990 Pro is the Pick
1.5 PB endurance rating on the 2 TB model, 5-year warranty, excellent random read performance (which is what actually matters for OS responsiveness), and Samsung’s stable controller. Buy the 2 TB version unless you have a specific reason not to — the price-per-GB is excellent and 1 TB is now too small for a primary drive.
WD SN850X — Strong Alternative
Almost identical performance to the 990 Pro, often $20-30 cheaper. Slightly higher idle power, slightly better sustained write performance. If price wins the day, this is a perfectly good substitute.
Crucial T500 — Best Budget
Around 90% of the 990 Pro’s performance at 70% of the price. This is the drive to buy if you’re filling out a 2nd or 3rd M.2 slot with bulk storage, or if you’re building a budget-focused PC.
PCIe 5.0 — When It’s Worth It
PCIe 5.0 SSDs (Crucial T705, Samsung 9100 Pro, Corsair MP700 Pro) make sense in three specific cases: extreme video editing workflows with multi-stream 8K footage, scientific computing with large random reads, and DirectStorage-optimized games (still rare in 2026). For everyone else, the heat and cost don’t justify the gain.
What to Avoid
- QLC drives in the primary slot — fine as bulk storage, but write speeds collapse once the cache fills
- DRAM-less SSDs as your OS drive — the latency penalty is real and you’ll feel it daily
- 4 TB drives at 50% price premium over 2 TB — almost always cheaper to buy two 2 TB drives
Heat Management
Modern NVMe drives need heatsinks. Most motherboards now ship with M.2 heatsinks; use them. If you’re running a fast drive without one, you will thermal throttle during sustained workloads and lose 30-50% of your real-world performance. PCIe 5.0 drives in particular need active cooling.