FOUND THE CULPRIT
[Should note a full Windows 10 reinstall still did not effect any of this]
UE5 will always use 100% of the GPU while having a context menu of any kind open. However this can be countered by having task manager set to “Always on Top” and open in the same monitor as UE5.
If you don’t want Task manager to be always taking up space while the engine is open WELL TOO BAD!! the best you can do is set it to “Fewer Details” and have it in the corner or something [As seen below].
If this isn’t good enough for you, just go cry about it in a corner about it like I did until you learn to cope with this. Tim Sweeny will never care about us.