ATI OverDrive

If you have a Radeon XT or X1000 series graphics card, then you will find a Performance section in the Control Center Graphics Settings, with OverDrive the main component underneath it. The OverDrive panel provides information about the current temperature of your graphics card's Graphics Processing Unit (the GPU or Core) which is only possible due to the presence of a temperature sensor on XT-based graphics cards. This is the reason why non-XT/X1000 cards do not have Overdrive, because it requires the physical presence of this temperature diode onboard the card itself.

If you tick 'Enable Overdrive', the OverDrive software will actively monitor your graphics card's temperature and allow you to manually overclock your video card's GPU (Graphics Processing Unit) core/engine speed as well as the memory if it is safe to do so. This is a nice method of achieving some extra performance safely, since OverDrive will not allow your graphics card to fry by overclocking it to insane speeds. If you want to overclock your system see the Overclocking section for more details.

A common question asked by users is "What is a safe temperature for my graphics card?" This varies depending on the particular graphics card series you have, since each is based on a particular architecture and hence has different heat output and tolerances. Typically, under most circumstances the 50-60 degree (Celcius) range is considered quite normal at idle, increasing into the high 70s under load. These temperatures will rise when overclocking or when your system is not properly cooled, and can result in crashes and freezes when under load. See the Overclocking section for more information on cooling.

Finally, note that some ATI graphics cards still don't come with OverDrive capability, such as All In Wonder cards. If you believe you should be seeing the OverDrive tab in the Control Center but it's not there, make sure to remember that the ATI Hotkey Poller service needs to be set to Automatic (See Tidying Up section above), and if necessary contact ATI Technical Support for more help.

照文中意思 應該 XT , X1000 系列就會看到, AIW 也無法看到
看來當初應該要買 X850XT OTZ

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