Comment on Chinese SSD Manufacturer UNIS Flash Memory Unveils World’s Fastest PCIe Gen5 SSDs, Featuring Speeds of Up To 14,900 MB/s

Thrashy@lemmy.world ⁨4⁩ ⁨days⁩ ago

The trouble with ridiculous R/W numbers like these US not that there’s no theoretical benefit to faster storage access, it’s that the quoted numbers are always for sequential access, whereas most desktop workloads are more frequently closer to random, which flash memory kinda sucks at, with even really good SSDs only delivering ~100MB/sec in pure random access scenarios. This is why you don’t really feel any difference between a decent PCIe 3.0 M.2 drive and one of these insane-o PCI-E 5.0 drives, unless you’re doing a lot of bulk copying of large files on a regular basis.

It’s also why Intel Optane drives became the steal of the century when they went on clearance after Intel abandoned the tech. Optane is basically as fast in random access as in sequential access, which means that in some scenarios even a PCIe 3.0 Optane drive can feel much, much snappier than a PCIe 4 .0 or 5.0 SSD that looks faster on paper.

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