Question about ASUS ROG Strix B450-F Gaming

Hello

Theoretically, you can even install 3. However, if you install one in slot 1, SATA ports 5 and 6 will be deactivated. If you install one in slot 2, the PCI Express slot will be halved from 16x to 8x. If you really only want to install 1 M.2 SSD, you should choose slot 3. The slot supports M.2 type 2242/2260/2280/22110.

Excerpt from the manual:
AMD Ryzen™ 2nd generation / Ryzen™ 1st generation processors*.
- M.2_1 Socket 3 with M Key, Type 2242/2260/2280
Storage device support (PCIE 3.0 x4 and SATA mode)**
- M.2_2 Socket 3 with M Key, Type 2242/2260/2280/22110
Storage device support (PCIE 3.0 x4 mode)***
- 2 x SATA 6 Gb/s ports
AMD Ryzen™ with Radeon™ Vega graphics card
- M.2_1 Socket 3 with M Key, Type 2242/2260/2280
Storage device support (PCIE 3.0 x4 and SATA mode)
- 2 x SATA 6 Gb/s ports
AMD B450 chipset:
- 4 x SATA 6 Gb/s ports
* Support SoreMI and NVMe RAID
** When the M.2_1 Socket 3 is operating in SATA or PCIE mode, the
SATA6G_5/6 ports are disabled.
*** When the M.2_2 is occupied by an M.2 device, the PCIe x16_1 will run in x8
mode.

kind regards