Bios does not recognize the M.2 drive or any other storage device.
Bios does not recognize the M.2 drive or any other storage device.
Details: Mb- Asus Rog strix B450-F gaming CPU - AMD Ryzen 7 3700X stock cooler, RAM - 2x Corsair 8GB, Graphics - Nvidia GeForce RTX 2070 Super Founders Edition, PSU - 750W, WiFi card, Storage - 1 NVMe as boot drive, 2TB HDD, and a 250GB SSD for the game I run (Windows 10 Pro x64). The problem began last night when I powered on the machine and adjusted BIOS settings for BAR resizing and RAM profile visibility (no overclocking). After restarting, pressing F10 to exit BIOS failed to boot and instead launched Windows Boot Manager. I revisited BIOS to verify the boot order; none of the drives were detected. After updating the same BIOS version on the SSD, it appeared in the boot sequence. Setting NVMe support and CSM to enabled with UEFI and legacy OPROM helped temporarily. I disconnected the NVMe drive, reinserted it in a different M.2 slot, replaced the CMOS battery just to rule out issues, but nothing resolved the issue. Currently, in the boot menu I have Windows Boot Manager as first choice and the 250GB SSD as secondary. Normally, in the hard drive BBS priorities there would be more options, but none were available. In short, after updating BIOS to the same version, the NVMe drive appears in boot options. Setting it as primary restarts BIOS, but exiting via F10 brings me back to Windows Boot Manager. Back in BIOS, none of the drives show up except for the first one, only after another update did it reappear during the initial boot.]
BAR resizing is limited to 30+ series NVIDIA cards and newer models. It might vary otherwise. Have you tried disabling it again?