PCIe Gen 5 SSDs have been on shelves for two years now, and prices have finally come down to flagship-Gen-4 territory. Samsung’s 9100 PRO 1TB sits at $249.99. Crucial’s T710 4TB hits $629. Meanwhile mature Gen 4 drives still deliver 7,000+ MB/s reads for less money. The question’s no longer whether Gen 5’s faster on a spec sheet. It’s whether you’ll feel the difference. We’ve spent a month comparing both generations across gaming, content workflows, and DirectStorage titles.
Matchup at a glance
PCIe Gen 4 NVMe peaks around 7,400 MB/s sequential reads on the fastest drives. Our reference Gen 4 entry, the SIX NVMe M.2 1TB at $174.99, advertises 7,350 MB/s. The GM988 2TB at $255.99 hits the same ceiling. Both use the standard M.2 2280 form factor and work on any Gen 4 motherboard from the past five years.
PCIe Gen 5 doubles the lane bandwidth to 32 GT/s. The Samsung 9100 PRO 1TB at $249.99 advertises up to 14,700 MB/s. The Crucial T710 4TB at $629 pushes 14,900 MB/s. Both require a Gen 5 M.2 slot, which means a Z790, Z890, X670E, or X870E motherboard. Both run hotter and need real cooling.
Spec sheet showdown
| Metric | Gen 4 NVMe | Gen 5 NVMe |
|---|---|---|
| Sequential read | Up to 7,350 MB/s | Up to 14,900 MB/s |
| Sequential write | Up to 6,900 MB/s | Up to 13,500 MB/s |
| 4K random read | ~1,000K IOPS | ~2,200K IOPS |
| Idle power | 30-50 mW | 50-80 mW |
| Peak temp under load | 65-72C | 78-90C |
Heat’s the headline trade-off. Gen 5 drives can hit 90C without active airflow, which forces thermal throttling. Most quality Gen 5 SSDs ship with chunky heatsinks for a reason. Our Crucial T710 sample stayed at 72C with the included sink. The Samsung 9100 PRO needed motherboard heatsink contact to stay under 75C.
Where Gen 5 actually shines
Content creation. Video editors moving uncompressed 8K footage, AI engineers loading 70-billion-parameter models, photographers scrubbing through RAW timelines. Sustained large-file transfers run roughly 1.8x faster on Gen 5. We moved 200GB of ProRes footage in 24 seconds on the Crucial T710. The GM988 Gen 4 needed 41 seconds for the same transfer.
DirectStorage-enabled games are the gaming wild card. Forspoken and Ratchet and Clank: Rift Apart show 25-35% faster level loads on Gen 5. Most 2026 AAA titles don’t yet exploit DirectStorage at full bandwidth, so the gap shrinks in real game libraries. Star Citizen and modded Cyberpunk 2077 are exceptions where Gen 5 helps.
Where Gen 4 wins on value
For gaming-only builds, Gen 4 is the obvious pick. Loading screens differ by 1-3 seconds in non-DirectStorage titles, which nobody perceives. The GM988 2TB at $255.99 gives you twice the storage of the Samsung 9100 PRO 1TB at $249.99. That’s a real upgrade in game-library headroom. Modern AAA installs run 100-200GB; you’ll fill 1TB faster than you think.
Power efficiency tilts Gen 4’s way too. Laptop users see noticeably better battery life on Gen 4 drives. The Ediloca EN600 PRO 256GB at $54.99 sits even further down the stack at PCIe 3.0, but for boot drives in budget builds, it’s still relevant. Most users don’t need Gen 5 anywhere in their system.
Compatibility’s the other quiet point. Gen 4 drives drop into any modern motherboard without checking the manual for Gen 5 slot allocation. AMD AM5 boards typically share Gen 5 lanes with the GPU; populating a Gen 5 M.2 can drop your graphics card to x8 mode. Gen 4 drives sidestep that mess entirely.
Which to buy
Buy Gen 5 if: you edit 8K video, train or run local AI models, need maximum bandwidth for scientific workloads, or want a future-proof flagship. The Samsung 9100 PRO 1TB at $249.99 is the smartest entry. The Crucial T710 4TB at $629 is for serious creators who need both speed and capacity.
Buy Gen 4 if: you’re a gamer, a general productivity user, or anyone who values capacity over peak bandwidth. The 2TB GM988 at $255.99 hits the price-per-gigabyte sweet zone. PS5 users specifically want Gen 4 with a heatsink; the SIX NVMe M.2 PCIe 4.0 1TB at $174.99 includes one and works in Sony’s expansion slot.
Don’t bother upgrading from Gen 4 to Gen 5 if your current drive’s healthy. The real-world delta in everyday use is small enough that the money’s better spent on RAM, a better GPU, or higher-capacity Gen 4 storage.
The price-per-gigabyte view
At current pricing, Gen 4 sits around $0.13 per GB on the GM988 2TB. Gen 5 lands closer to $0.25 per GB on the Samsung 9100 PRO 1TB and $0.16 per GB on the Crucial T710 4TB. Capacity scales better with Gen 4 unless you specifically need flagship bandwidth. For most builds, dropping the Gen 5 surcharge into more storage or a better cooler pays larger dividends than chasing peak sequentials.
Common questions
Will a Gen 5 SSD work in a Gen 4 motherboard?
Yes, but it’ll run at Gen 4 speeds. You’re paying for bandwidth you can’t access. If your motherboard’s Gen 4 only, save the money and buy a top-tier Gen 4 drive instead.
Do Gen 5 SSDs need a fan?
Most do, in practice. The heatsink that ships with the drive (or comes from your motherboard) usually handles bursts. Sustained writes longer than 30 seconds without airflow will throttle most Gen 5 drives.
Does DirectStorage actually use Gen 5 bandwidth?
Partially. Most current DirectStorage titles cap requests at Gen 4 levels because the developer pipelines haven’t fully caught up. Expect bigger gaps over the next two years as studios optimize.
What’s the Gen 5 SSD lifespan compared to Gen 4?
Roughly the same. TBW (terabytes written) ratings depend on NAND type and capacity, not the PCIe generation. The Samsung 9100 PRO 1TB carries 600 TBW; comparable Gen 4 drives sit in the 600-700 TBW range.
Can I use a Gen 5 SSD in a PS5?
No. The PS5 expansion slot’s Gen 4 only and Sony has thermal envelope rules. Use a Gen 4 drive with a built-in heatsink like the SIX NVMe M.2 1TB at $174.99 or the GM988 2TB at $255.99.
Does Windows benefit from a Gen 5 boot drive?
Barely. Windows boot times and app launches saturate well before Gen 4 limits. The 4K random read advantage of Gen 5 is real but invisible to most users. Save the money for capacity.
