The SSD model in my flex is the SAMSUNG MZVLB512HBJQ-000, available OEM only and is a PM981 based SSD. Curiously I haven't seen this SSD listed under specs for the Flex elsewhere, and have only seen it listed with the Intel 660p SSD in reviews and tear downs.
What SSD model do you guys have?
I'm wondering why it has Microsoft's Standard NVMe Controller driver installed and not a Samsung NVMe Controller driver. I can't find a driver listed by Samsung for PM981 based SSD's, but I've read from various sources* that the Samsung NVMe 3.2 drivers do work just fine with them, even though they're listed as supporting only " Samsung NVMe SSD 970 PRO, 970 EVO, 970 EVO Plus, 960 PRO, 960 EVO and 950 PRO ".
Version 3.3 is available here - SSD Tools & Software | Download | Samsung V-NAND SSD | Samsung Semiconductor Global Website
I'm tempted to try it. Not just for any impatience of getting the Windows feature updates, but to have a bit more flexibility and control of the hardware I've paid for. I'm also nervous to try it because this is the only productivity device I've got access to at the moment. So it's paying the bills.
*Sources who've tried with success the v3.2 and v3.3 updates with this SSD:
Samsung NVME 3.2 drivers do work with PM981 based SSD : thinkpad (reddit.com)
Driver for nvme pm991 - HP Support Community - 7839549
If I do try it, I'll prioritise posting here to say if it's a win or a fail. So if I don't post, it's because I haven't tried it.
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