https://us.community.samsung.com/t5/Monitors-and-Memory/Samsung-990-PRO-2TB-Performance-Degradation-After-7B2QJXD7/m-p/3401375#M17618 <P>"Does anyone have result performance before and after firmware update?"&nbsp; Well, one can only hope so.&nbsp; The difficulty, of course, is that, to my knowledge, there's no way to rollback the firmware version, so there's no way to readily repeat the experiment.</P><P>"It seems like everyone is pointing the issue towards the firmware, solely based on the fact that the firmware was the last thing that changed."&nbsp; Fair enough, but, hey, isn't that the scientific method?<BR /><BR />"I am not seeing the same issue."&nbsp; I understand -- although how much of the drive's capacity is used may also play a part (in my case, it's my system drive with 5 partitions, and total usage is ~55%).&nbsp; Unfortunately, I'm using Linux, so I can't use Samsung Magician to assess performance -- another variable in assessing this issue.<BR /><BR />I repeated my initial post on Anandtech, trying to drum up more data.&nbsp; My most recent post there provides a little more data as well as the fio commands that I'm using (see&nbsp;<A href="https://forums.anandtech.com/threads/samsung-990-pro-2tb-performance-degradation-after-7b2qjxd7-firmware-upgrade-capacity-specific-bug.2632571/#post-41530313" target="_blank">https://forums.anandtech.com/threads/samsung-990-pro-2tb-performance-degradation-after-7b2qjxd7-firmware-upgrade-capacity-specific-bug.2632571/#post-41530313</A>).<BR /><BR />Note that the degradation in random write performance that I'm measuring isn't really perceptible -- if I weren't benchmarking after each major change, I wouldn't have noticed anything different.</P> Fri, 07 Nov 2025 17:54:15 GMT SFdrifter 2025-11-07T17:54:15Z