b550m aorus elite

The issue is in the title, recently bought the GPU to replace my existing RTX 3080 (working properly in the same system). Current specs are: Motherboard: B550M Aorus Elite rev 1.0 (Latest BIOS installed - F20g, Mar 11, 2025) CPU: Ryzen 7 5800X PSU: MSI A1000G PCIE5 Booting up the PC gives me...

As the title says, my Kingston A2000 SSD is not recognized in the top slot, but seems to be working in the bottom one. Drive is healthy and working in another build. Sometimes the system boots and recognizes that NVMe for a while, say 10 to 30 minutes, and then suddenly it disappears and isn't...