If its an Nvidia card, I have an XFX 7600GT AGP, the driver I use 93.71 from XFX which allows me to use a little utility called Coolbits. By "Turning Up" if you mean overclocking, yes, I overclock mine, I use the utility to discover the maximum amount allowed then back it of a little to what I feel safe with according to the card temperatures and the way the PC reacts to it.
One note the standard Nvidia 93.71 driver does not allow this only the XFX version of it does, point being that theres alot more to it than just the casual "Turn it Up"