Check out Jeff Geerlings page. He has a list of tested NVMe M.2 drives that work or don't work with the Pi5.? Also, if you set it to PCIe x3, you are probably getting read and write errors.? Go back to PCIe x2 and see how it runs. You also need to enable the NVMe in the config.txt file.
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Using a Pi-5 and 64 bit Bookworm.? Seems OK booting on SD card.? Internet extremely slow booting on SSD.
Several attempts to make it work.? Latest was using SD card and updating it.? Then write SD to SSD.? Switched to boot SSD.
Chromium seems to make it fail; it gives a timeout.? Then rebooting from SD card lets Chromium work.
I use the Pineberry BOT to connect the SSD.? SSD is a Fikwot FN501pro.
Any ideas what I should do?