Question New Motherboard and cpu, no bootable device found?

Jan 2, 2022
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Hi so I’m new to everything PC but I bought a outdated computer a while back, it ran but the gpu was on its last leg I think, and I decided to just pretty much start fresh, I installed a new motherboard (Asus Z590), a new cpu (intel i5 11600k) and the gpu is a Nvidia 960. Before installing all this I had windows 10, I’m using the same ssd that was in the pc originally, when I power up the pc it goes to the bios menu and it recognizes the ssd but I can’t boot from anything. Maybe I’m just missing something which is quite possible since I’ve never done this before, any help is much appreciated thank you