Why do Windows 7 basic theme (no-aero) render all UI on CPU?

[sam1275tom]

Hello.
I see lots of people say that the Windows Aero offload the UI to GPU thus make it's actually faster than Windows Basic theme, so I did a compare test and verified it's true, the Basic theme is more lag and use much more CPU when doing the same thing(such as fast moving a window continuously).
So why don't Basic UI run on GPU? Wouldn't a simple UI with GPU offload be the best thing? Also I want to know how the UI is handled in a System with no Aero, such as Windows XP or Windows 10?
Thanks.

 

[jamesp33]

The CPU handles the Classic and Luna themes. That's why it's slower. If you want true speed turn off animations and transparency. And also turn off Windows features you don't need.

 

[sam1275tom]

The CPU handles the Classic and Luna themes. That's why it's slower. If you want true speed turn off animations and transparency. And also turn off Windows features you don't need.

Thank you, I just tried tuning "Visual effects" in advanced system settings, but if I turn many effects off, it automatically disable aero and render on CPU, so which setiing trigger aero?

 

[jamesp33]

The CPU handles the Classic and Luna themes. That's why it's slower. If you want true speed turn off animations and transparency. And also turn off Windows features you don't need.

Thank you, I just tried tuning "Visual effects" in advanced system settings, but if I turn many effects off, it automatically disable aero and render on CPU, so which setiing trigger aero?

You can learn everything it here - http://www.brighthub.com/computing/windows-platform/articles/25197.aspx