PCIe Gen4 vs Gen5 SSDs
PCIe Gen4 SSDs have been the standard for high-performance storage, but Gen5 is now emerging, promising even faster speeds. This guide breaks down the key differences between these two generations, helping you decide which is right for your next build. We'll cover speed, cost, thermal considerations, and practical benefits.
Speed: A Generational Leap
PCIe Gen4 SSDs typically offer sequential read speeds up to 7,000-7,500 MB/s and write speeds around 6,000-7,000 MB/s. In contrast, PCIe Gen5 SSDs push these limits significantly, with top-tier models like the Crucial T700 or Samsung 990 EVO hitting sequential reads of 12,000-14,000 MB/s and writes up to 10,000-12,000 MB/s. This represents roughly a 50-100% increase in theoretical bandwidth.
Price: The Early Adopter Premium
Gen4 SSDs are now mature, offering excellent performance at competitive prices, with 1TB models often found for $60-$100. Gen5 SSDs, being newer technology, command a significant price premium. A 1TB Gen5 drive can cost $150-$250, making them considerably more expensive per gigabyte than their Gen4 counterparts. This price gap is expected to narrow over time but is substantial currently.
Heat and Cooling: A New Challenge
The increased performance of Gen5 SSDs generates more heat, making robust cooling solutions essential. Many Gen5 drives come with substantial integrated heatsinks, and some motherboards even feature dedicated M.2 heatsinks for Gen5 slots. While Gen4 drives can benefit from heatsinks, they are often optional; for Gen5, they are practically mandatory to prevent thermal throttling and maintain peak performance.
Real-World Benefits: Who Needs Gen5?
For most everyday users, gamers, and even many content creators, the real-world performance difference between high-end Gen4 and Gen5 SSDs is negligible. Loading times in games, general OS responsiveness, and typical application launches are already incredibly fast on Gen4. Gen5 truly shines in highly demanding professional workloads involving massive file transfers, uncompressed 8K video editing, or large database operations where sustained, extreme throughput is critical. DirectStorage, a technology that could leverage Gen5 speeds for gaming, is still in its early stages.
Key takeaways
- •For most users and gamers, PCIe Gen4 SSDs offer excellent performance at a much better price point.
- •PCIe Gen5 SSDs provide significantly higher theoretical speeds, but these benefits are primarily seen in niche, professional workloads.
- •Gen5 drives are considerably more expensive and require robust cooling solutions due to increased heat generation.
- •Consider Gen5 only if your workflow involves constant, large file transfers or if you want the absolute bleeding edge and are willing to pay the premium.
What to do next
- →Browse our selection of top-rated PCIe Gen4 SSDs.
- →Read our guide on 'Understanding M.2 SSD Heatsinks'.
- →Explore motherboards with PCIe Gen5 M.2 slots.
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