Reply 12920 of 29601, by PTherapist
wrote:wrote:Disabling Aero on Vista & 7 actually degrades performance as it switches the GUI rendering from the graphics card and onto your CPU instead and you'd notice things like bad tearing on 3D gaming & video playback.
I highly doubt that this is true. Yes, no Aero means that the CPU has to draw the screen, but you also lose all of the heavy GUI features like Aero Peak, transparency, etc. and it will still use the 2D acceleration of the graphics card (the blitter, that is). So the CPU won't have that much to do. On slower Intel chipsets with integrated graphics, Aero was often disabled by default, because the GPU was to slow for it. That of course means that the CPU renders non-Aero faster.
Try it and see. It's quite a well known issue and even if you don't spot the difference in performance, you will certainly experience terrible tearing in many games, emulators & all video playback with Aero switched off. Some programs/games prefer Aero off to function correctly, as such it's much better to leave it on and where necessary turn it off on a per-program basis via Compatibility options.