My Screen Saver is awry & need help
Screensavers were developed do deal with issues that affected CRT displays. As nobody makes them anymore, and LCD displays don't have the same issues, we no longer need screensavers. A screensaver running on a flat screen monitor just looks pretty - there is no difference to the operation.

Open System Preferences.

Go to Desktop -> Screen Saver and set the "Start after:" value to Never.

Go to Energy Saver and set "Turn display off..." to whatever value you want.

This actually powers down the screen illumination and most of the GPU.