My multi-monitor situation causes even MS's 3d screensavers to take some time exiting (5 or so seconds). I just tried 3d FlowerBox in software mode, and its default settings cranked my resolution way ...
Acer A243W monitor. Screensaver set for 99 mins. If it is standing upright, after a few minutes, the monitor goes blank, power button goes blue, and I have to hit the power button to get it to turn on ...