No, you can't use this on your old 3Dfx cards. Diamond has issued a
tool to overclock their new line of cards except for the S60 series and is designed for Windows XP. From the site, "
Unlike any
video utility available, this tool allows for overclocking of the video
card through the use of a 3D renderer that scans for artifacts and
monitors the effects of environmental and GPU temperatures. It then
automatically modifies the GPU, video RAM and fan speeds to provide
optimum video performance without degradation to video quality it
produces".