ATi Tool

# No limits overclocking.
# Finding maximum core and memory overclock by rendering into a Direct3D window and scanning the output for visual artifacts.
# Temperature monitoring and fan speed control (on supported cards)
# Removal of Catalyst overclocking lock for 9000/9200/9550/9600 series.
# Artifact scanning mode for non-ATI cards - use together with a 3rd party overclocking utility.
# Loading a predefined clock profile on Application/Windows startup.
# Hotkeys that can be used any time to load clocks from a profile.
# 3D application detection (Direct3D 8, Direct3D 9, OpenGL) to overclock your video card only when required.
# Gamma control