I recently bought an Adata premium M.2 Gen 4 SSD for my PS5, which was a steal at 93 CAD (68 USD). Although the SSD health shows 99% and works fine, its speed is around 25% of what was advertised. I've tested it with CrystalDiskInfo and HD Tune, and everything looks good. My motherboard is an Aorus X470 Ultra Gaming, which has two M.2 slots. I suspect I'm using the second slot, which supports PCIe 2.0, but I'm unclear about how that affects the performance. Does anyone know what generation the M.2 B socket is, and how I can get better speeds?
1 Answer
So here's the deal: an M.2 Gen 4 SSD would typically use PCIe 4.0 x4, while your second slot only supports PCIe 2.0 x4. That’s about 25% of what you could be getting with the Gen 4 SSD. It's likely the reason for your slow speed issue.
Exactly! So PCIe indicates the generation, right? It sounds like you've got a Gen 4 SSD but in a Gen 2 slot, which really throttles the performance. If you move it to the Gen 3 slot, you should see a boost but not the full speed.