Power Strip is a great program, PERFECTLY inverts color on my old computer with 2 monitors and ati graphic card (i have profiles: only left inverted, only right, none, and both and i have hotkeys for each profile), on my PC i got 2 days ago, i have nvidia gt430 and nvidia cards don't let you check the "Write directly to palette DAC" box so powerstrip CANT invert colors (on newer nvidia cards), i have read somewhere that you can invert colors in nvidia control panel (i think this is true but was unable to check for myself) http://www.wikihow.c...Your-Windows-XP
point 9-18 explains how you can do that on (and only on) windows XP because of point 15 "Under '2. Apply the following ....' switch to graph tab."
nvidia control panel "graph" help:
"Graph Tab (Windows XP only)
For those experienced with color correction using curves, the graph tab provides more precise control over the desktop color balance."
under windows 7 there is no graph tab hence not powerstrip nor nvidia itself can't invert colors...
i am thinking of changing my graphic card for some ati card if i dont find the solution soon...