If the M.2 not showing up in BIOS issue occurs, the above way may solve the problem. In addition, in the Note section, you can see that the M.2_1 slot shares bandwidth with SATA_2, so if the M.2_1 slot is connected to an M.2 storage device, the SATA port 2 (SATA6G_2) will be closed, and the SATA hard disk cannot be recognized. Therefore, if a SATA mode M.2 SSD is connected to the M.2_2 slot, the motherboard cannot recognize it. Taking the PRIME Z490-A motherboard as an example, go to its Tech Specs page, in the Storage section, and you can see that the M.2_2 slot only supports PCIE mode SSD. However, if it is an M.2 SSD that is not showing up in BIOS, you need to consider this case: the M.2 SSD is not supported by the M.2 slot. To know how to install an M.2 SSD, you can refer to this post: How to Install an M.2 SSD on Windows PC. To know how to install a SATA SSD, you can refer to this post: How to Install a Second Hard Drive in Your Laptop and Desktop PC. In this case, you need to find the SATA Configuration in BIOS and set it to IDE Compatibility Mode. If you want to install Windows XP and lower systems to a new SSD, the SSD may be not detected because the system doesn’t include SATA drivers. Why is my SSD not showing up in BIOS? Why is my M.2 SSD not showing up in BIOS? The reasons are as follows: However, some people report that they have encountered the “SSD not showing up in BIOS” issue after they upgrade to an SSD. In other words, all hard drives will be detected and listed in BIOS. Therefore, the BIOS will detect all hard drives and check them one by one to find a bootable disk. When you power on a PC, the BIOS firmware will be woken up first to do a power-on self-test (POST), and then attempt to boot up the PC according to the boot sequence. In computing, BIOS (Basic Input/Output System) is firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the booting process (power-on startup). What to do if your SSD is not detected in BIOS? This post from MiniTool Partition Wizard tells you why the SSD is not detected and offers you 4 ways to solve the “ SSD not showing up in BIOS” issue.
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