Research · Updated 2026-10-16

Gen4 vs Gen5 SSDs in Gaming Laptops (2026)

Gen5 SSDs promise double the speed of Gen4 — but for gaming, the promise is empty. Sequential speeds do not determine game loading; capacity and random performance do. Here is the honest storage guide.

UK guide to laptop SSD generations in 2026.

Gen4 vs Gen5 SSDs in Gaming Laptops (2026)

Illustrative stock photo (Pexels / Unsplash)

The speed numbers vs reality

Gen4 vs Gen5 fundamentals: Gen4 (PCIe 4.0) tops out around 7,000 MB/s sequential; Gen5 (PCIe 5.0) reaches 14,000 MB/s. The numbers are dramatic — the real-world gaming difference is not. Game loading depends on random read performance and CPU decompression, where Gen5's advantage shrinks to low single digits.

DirectStorage (GPU-accelerated asset loading) was supposed to change this — but in 2026, few games implement it meaningfully, and those that do show modest gains. The storage bottleneck in gaming is not sequential speed.

When Gen5 actually matters

Where Gen5 genuinely matters: video editing (8K ProRes timelines), large file transfers (100GB+ regularly), dataset work (ML, scientific computing), and heavy multitasking with storage-intensive apps. If you move big files for a living, Gen5's sequential speed saves real time.

Where it does not: gaming, office work, web browsing, photo editing (Lightroom catalogues are random-access), and general use. For 95% of laptop buyers, Gen4 is indistinguishable from Gen5 — and the money is better spent on twice the capacity.

Heat: Gen5's hidden problem

Heat is Gen5's hidden cost: Gen5 controllers run significantly hotter than Gen4, requiring heatsinks that do not fit in many laptop M.2 slots. In thin laptops, a Gen5 SSD can throttle under sustained loads — delivering Gen4-or-worse real performance while generating more heat.

The laptop reality: most 2026 gaming laptops ship with Gen4 SSDs, and that is correct. Gen5 in laptops is a spec-sheet feature with thermal compromises — fine in desktops with heatsinks, questionable in thin chassis.

The capacity-first strategy

Storage buying strategy: prioritise capacity over generation — a 2TB Gen4 SSD (£120–£150) beats a 1TB Gen5 SSD (£150+) for every gaming use case. Buy 1TB minimum, 2TB comfortable; add a second SSD later if the laptop has a spare slot (most 16-inch models do).

For upgrades: any reputable Gen4 NVMe SSD (Samsung 990 Pro, WD Black SN850X, Crucial T500) is excellent. Do not pay the Gen5 premium for a gaming laptop — it is the least cost-effective upgrade in the machine.

DirectStorage: the gaming promise

DirectStorage: the promise — the GPU decompression (the SSD to GPU — the CPU bypassed — the speed); the games (the supported — the few — the growing); and the reality (the 2026 — the nascent — the future).

The DirectStorage truth: the technology (the real — the Microsoft — the standard); the adoption (the slow — the games — the coming); and the SSD (the NVMe — the required — the Gen4 suffices). The gamer (the 2026 — the waiting — the patient); the future (the DirectStorage — the mainstream — the 2028). The promise (the genuine — the delayed). The Gen5 (the ready — the waiting).

Thermals: Gen5 runs hot

Gen5 thermals: the heat — the controller (the hot — the 10W+ — the throttling); the heatsink (the required — the motherboard — the included); and the laptop (the cramped — the thermal — the challenge).

The thermal reality: the Gen5 (the fast — the hot — the managed); the laptop (the thin — the airflow — the limited); and the solution (the heatsink — the pad — the essential). The throttling (the uncooled — the slowdown — the Gen4-like); the cooled (the sustained — the fast — the proper). The heat (the speed's price). The Gen5 needs — the cooling.

The price curve: Gen5 SSD pricing

Gen5 SSD pricing: the curve — the 2024 (the premium — the 2× Gen4); the 2026 (the narrowing — the 30–50% — the approachable); and the future (the parity — the coming — the inevitable).

The pricing wisdom: the 2TB Gen4 (£100 — the value — the now); the 2TB Gen5 (£150–£180 — the premium — the future); and the buyer (the value — the Gen4; the enthusiast — the Gen5). The curve (the falling — the waiting rewarded); the need (the real — the assessed). The price (the time — the falling). The Gen5 (the tomorrow's standard — the today's premium).

The 2TB sweet spot: the 2026 default

The SSD buyer's 2026 sweet spot is the 2TB Gen4: the price (the £100 — the value — the obvious); the speed (the 7,000MB/s — the ample — the unnoticed); and the space (the 2TB — the games — the breathing). The 2TB Gen4 is the 2026's default — the capacity that holds the library, the speed that never bottlenecks. The buyer gets the 2TB — the £100 well spent.

The sweet-spot method: the slot (the second — the filled — the 2TB); the clone (the migrated — the Macrium — the free); and the old (the repurposed — the enclosure — the £15). The 2TB Gen4 is the no-brainer — the price, the performance, the capacity. The sweet spot is the 2TB.

The 2027 moment: the Gen5 patience

The SSD buyer's Gen5 moment is the 2027: the prices (the falling — the approaching — the parity); the need (the DirectStorage — the maturing — the coming); and the buy (the 2026 — the Gen4 — the wise). The Gen5 in 2026 is the premium without the purpose — the 2027 is the mainstream with the reason. The buyer waits — the Gen4 serves.

The moment method: the watch (the prices — the tracked — the noted); the trigger (the parity — the reached — the bought); and the calm (the Gen4 — the excellent — the years). The Gen5's moment is the coming — the patient buyer meets it. The 2026 is the Gen4's; the 2027 is the Gen5's.

The 8TB horizon: the SSD growth

The SSD buyer's 2028 is the 8TB: the games (the 300GB — the growing — the 2028); the 4TB (the 2026 — the enough — the now); and the prices (the falling — the £300 — the awaited). The 2028's 8TB is the 2026's 4TB — the games grow, the SSDs follow. The 2026 buyer gets the 4TB — the 2028, the 8TB. The storage grows; the library stays.

The growth method: the now (the 4TB — the bought — the never-delete); the later (the 8TB — the watched — the upgraded); and the calm (the enough — the years — the enjoyed). The SSD growth is the inevitable — the prices fall, the capacities rise. The 2026's 4TB is the wise.

Verifying and upgrading

SSD checklist: verify the installed SSD's generation and capacity (listings sometimes vague — "1TB SSD" could be Gen3), check the spare M.2 slot count (for future expansion), and confirm the physical size (2280 is standard; 2230 appears in thin models).

Check the live price of SSDs separately — manufacturer storage upgrades are heavily marked up. Buy base storage, upgrade yourself, pocket the difference.

Frequently Asked Questions

Is a Gen5 SSD worth it for gaming?

Gen5 SSDs are twice as fast as Gen4 on paper (14,000 vs 7,000 MB/s sequential) — but for gaming, the difference is negligible. Game loading is limited by random access and decompression, not sequential speed. Gen4 is plenty for gaming in 2026.

When does Gen5 matter?

For video editing (8K footage), large dataset work, and heavy file transfers, Gen5's sequential speed is genuinely useful. For gaming, office work and general use, Gen4 is indistinguishable — spend the premium on capacity instead.

Do Gen5 SSDs run hot?

Yes — Gen5 SSDs run significantly hotter than Gen4 and need heatsinks (which do not fit in all laptop M.2 slots). In thin laptops, Gen5's heat is a genuine concern. Gen4 runs cooler and is the safer laptop choice.

How much SSD storage do I need?

1TB is the practical minimum for gaming in 2026 (modern games exceed 100GB); 2TB is comfortable. Buy the capacity you need — a 2TB Gen4 SSD beats a 1TB Gen5 SSD for every real use case.