Need help 3060ti build

Made a post already about this but now I’m asking for general assistance with just installing it to make sure I’m not fucking up. Tried multiple things with this such as a different pcie cable and a different slot, I tried unplugging everything from my motherboard and then back in. My pc runs fine when the GPU isn’t installed but the moment I install it my PC runs for about 2 minutes then cuts off. Lmk a route I can take if yk one