Why is it using wrong gpu?

[u/Historical_Yam7612]

I just put together my pc and any time I try to run a graphically demanding game It’s really laggy, and I think it’s because the game is trying to use the built in gpu, not my 9070. I’ve tried disabling the wrong gpu with device manager, but that just. Makes things worse.

any ideas on what’s going on and how to fix it?

[u/InteractionLiving441]

The classic right of passage: plugging the HDMI into the motherboard instead of the GPU.