If you are going to replace it soon anyway, you can push towards 1.5v voltage, if you can keep temps under 70c. If your mobo vrm is weak, it will put a strain on it and it could give in at the long run, but for short term I'd say that's relatively safe.
Consider delidding for doing that to lower temps. The more you push voltage, the more important it is to keep cool. Stock voltage even mid 80s would be okay for long term with some passive cooler IMO.
If your mobo is super cheap, I don't recommend it though.