By default, IE9 and IE10 uses GPU Rendering mode (hardware acceleration). However, some outdated video cards/chips and video drivers
do not support GPU hardware acceleration. If IE9 or IE10 determines that your current video card/chip or video driver
does not support GPU hardware acceleration, Internet Explorer uses Software Rendering mode (off).
If GPU hardware acceleration is turned off, then you may experience slow performance when you browse a webpage using IE9 or IE10.