Sure that PSU is adequate? The NVidia specs recommend a 750W PSU. Before you swap in the new GPU, reboot and immediately start tapping F2 to open BIOS setup. Find and disable the Secure Boot option. Save the change and exit setup. PC will boot itself automatically when you exit setup. Then power off normally from the desktop and swap in the new GPU. This GPU requires a 2x PCIe 8-pin connection directly from the PSU, so hopefully your new PSU has the right connector, or an adapter is available. Don't forget to make that connection before booting the PC. Keep in mind if you haven't already updated to Win 11, you'll have to take some extra steps before updating because Win 11 wants Secure Boot to be enabled, so you'll have to bypass that requirement.  
what steps would i need to take in order to upgrade to an rtx 3080, don't care about the bottleneck, just wanna not have an rx580 in my system.   steps I've already taken upgrading the psu, got a Thermaltake smart 700w specs ryzen 7 1800x 2x8 2400 rest is kinda meaningless when it comes to this   right now I'm waiting for the 3080 to arrive, but I've read some articles that say you need to turn safe boot and some other stuff off via the bios, could I be informed on how to do this?
GPU Upgrade Inpsiron 5675.