Question Invalid boot device after swapping video card - m.2

[Calab]

I have a Gigabyte H170-D3HP mainboard, latest BIOS, with an i5 6600 CPU. My boot drive is an m.2 ADATA SX8200NP. I have been running this system with an EVGA GTX 1050ti video card for a while without any issues. Power supply is a 500watt OCZ.

Today, I swapped out the 1050ti for an MSI RX 470. Card is seated properly and power cable is also connected. When I boot the system I get an message to select a proper boot device. I've checked by BIOS settings and the SX8200 is still set as the boot device.

Any ideas why my m.2 drive is no longer bootable with the RX 470 card installed?

 

[anotherdrew]

@Calab

I had something similar happen with a Gigabyte motherboard. I fixed it by disabling UEFI CSM (support for legacy drives). You can find that option on the "BIOS Features" tab of your BIOS

 

[Calab]

sigh It was something a bit simpler... I knocked one of the power cables loose on my SATA drives. Apparently my boot manager is not on my system drive.

Everything is back to normal now.

 

[anotherdrew]

Glad you figured it out!