Disable the window moving feature in Xorg and use Tiling instead

I've noticed when moving windows Xorg takes up a lot of CPU. But I only have a weak old Celeron Single-core with 2.80GHz. So my question is that how to disable the moving windows feature and use Tiling instead. I remember that there is actually a Window Manager that only uses Tiling, no moving.

Or if no, I need to know how to move window in Openbox with the window only move the frame (like in Windows XP, where there is a feature that disables moving windows and only moves it frame, but after release the mouse it teleports the window directly there).