Frame rate issues (lower frame rate = latency)

Hello, I’m working on a 2d platformer, and I’m having a strange issue. When the game is run at 30fps (instead of 60) there is slight screen tearing and about a quarter second of latency between key input and in-game effects. My laptop runs at 60fps with power, but drops this game to 30fps. This is because it has a “low power mode”. This is perfectly fine, I want this to happen and it’s a good contingency to code against. What I can’t figure out is how to make the application override what my computer wants to do, OR figure out why it breaks so bad at 30fps and fix it. SetTargetFPS has not worked, and changing the V sync settings has made no visible difference.
Any help is appreciated, and thanks in advance!

The solution was to get a new PC.