PCIe 5.0 SSDs have officially crossed over from niche enthusiast hardware to mainstream availability, and the question on most buyers' minds is whether the new generation is worth the jump. With drives like the Samsung 9100 PRO now shipping in popular 2TB capacities, Gen5 storage is no longer a rarity reserved for early adopters. But faster on paper does not always mean faster where it counts, and the honest answer to "should you upgrade?" depends entirely on what you do with your PC.
What Changed With Gen5 Storage
The headline with PCIe 5.0 is bandwidth. A Gen5 x4 drive has roughly double the theoretical throughput of an equivalent Gen4 drive, and that ceiling is what makes the new class of SSDs attractive. The Samsung 9100 PRO 2TB is a flagship example: a PCIe 5.0 x4 NVMe drive in the standard M.2 2280 form factor, built to push sequential transfers well beyond what the previous generation could manage. For workloads that move enormous files in and out of storage, that extra headroom is the entire point.
It is worth being clear about where that speed shows up. Sequential throughput is the number that improves dramatically. Random read and write performance, which is what most everyday tasks and game loading actually lean on, has improved far less between generations. That gap explains why the upgrade math looks very different depending on who you are.
Who Actually Benefits
The clearest winners are users with large-file and content-creation workloads. Video editors scrubbing high-bitrate footage, photographers handling massive RAW libraries, 3D artists loading heavy scenes, and anyone regularly copying tens of gigabytes at a time will feel the difference in a Gen5 drive. If your day involves waiting on storage to move big files, the 9100 PRO is built for exactly that.
Future-proofing is the other honest reason to buy in. If you are putting together a new high-end build on a current platform, choosing a Gen5 drive means the storage will not be the bottleneck for years. For a forward-looking system, it is a reasonable place to spend.
For most gamers, though, Gen4 is plenty. Game load times are bound more by random access and engine behavior than by raw sequential bandwidth, and the practical difference between a fast Gen4 drive and a Gen5 drive in actual gameplay is small. Spending the upgrade budget elsewhere usually makes more sense for a gaming-first build.
The Heat and Slot Catch
Gen5 performance comes with practical strings attached. These drives run hotter than their Gen4 predecessors, and sustained transfers can push them toward thermal throttling without adequate cooling. A proper heatsink is not optional for getting consistent performance out of a Gen5 SSD, so check whether your motherboard includes a heatsink for its primary M.2 slot or whether you need to add one.
Just as important, you need a Gen5-capable M.2 slot to see Gen5 speeds at all. Many boards wire only one M.2 slot to PCIe 5.0, and the rest run at Gen4. Drop a Gen5 drive into a Gen4 slot and it will work fine, but it will run at Gen4 speeds, which defeats the purpose of paying for the newer drive.
The Practical Pick
If you want the most throughput available and have a Gen5-ready board with cooling to match, the Samsung 9100 PRO is the drive to look at. If you are building or upgrading a gaming or general-use system, the Samsung 990 PRO 2TB remains the proven, mainstream choice. It is a Gen4 NVMe drive in the same M.2 2280 form factor, fast enough for nearly everything outside heavy professional file work, and it runs cooler and with fewer requirements than a Gen5 drive. Either way, check the current price on Amazon before you decide, and match the drive to how you actually use your PC rather than to the bigger number on the box.