<A HREF="http://www.techspot.com/tweaks/radeon/index.shtml" target="_new"> Techspot </A> has a nice little guide on how to tweak Radeon graphics cards. All the information will be redundant to experienced users, but it should be a good guide for people just getting into grahphics cards, or complete n00bs They also talk a little on the different types of filters, and what all the new marketing terms mean (W buffer, z compression and such). They also mention which options may cause stability problems, or what ones can be disabled to help the system.
275MHz is 550, so that's half way between 500 and 600.
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