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But seriously though, I cut off a good 30-40% from my GPUs power limit and would you look at that, I still enjoy the games I play.
Have to run most of them at low to medium settings anyway, so might as well.
Only thing left to improve it further would be undervolting, I should try that at some point.
Undervolt it too. Depending on what GPU you have, you might drop an additional 20-40% without a performance hit. An older GTX1070 I used to have dropped power consumption by 40%. The energy savings weren't that big, but it was nice and quiet
Currently using a GTX 970 on EndeavourOS, I believe tuxclocker can do undervolting, haven't tried it yet
Undervolting has the added benefit of reducing silicon degradation. I don't know how much it'll help your GPU, considering it's age, but it's something
I've put it through absolute overclocking hell, and it still runs as happily as it always did, so there's that.