"As you hold your mouse button, you can see that the background color of the clock info 00 boxes on the top of the tab changes. The boot state mostly, but not for all BIOSes, has only one clock info mode, mostly mode 00. Click and hold the State 1 now. In this example, it says "Power saving for notebooks..." and so on. This may differ for your BIOS. Clicking and holding state 1 in this example yields that state 1 corresponds to clockinfo 01, 02 and 03. Scroll the list box over to the right now. You may see something like "high performance" and/or "optimal performance". So, this state seems to be the mode the card usually is switched to after booting. The state has three modes, as you see. One is denoted as "low", one as "medium" and one as "high". This is a rule of thumb that might help you: Maybe the card finds itself in the "low" mode when being at the window's desktop (Windows XP). Windows Vista's aero desktop might require the card to switch to "medium". After starting a 3D application like a computer game, the card should switch to high. As you can see, for this state the "high" mode (clock info 3) has higher clock rates. To overclock the card for games, it should be a good idea to increase the settings here. For power saving in 2D mode, decrease the settings in clock info 01 in this example.
Please note that the RAM clocks should be the same for all clock infos as on the one hand, decreasing this doesn't save a lot of power and on the other hand, switching the mode (and switching the RAM clocks if they aren't all the same) will cause an annoying flickering of the screen. You understand now that ATI themselves programmed the RAM clocks to all the same values for a reason.
However, at least the GDDR5 RAM the 4870 and some future cards use is reported to consume more power, though. So it's up to you: Save power and lower the clocks or leave the clocks at high rates, waste some power but be free of any flickering on frequency switching.
Moving on in this example, state 2 (clock info 4, 5 and 6) is used for UVD, the video playback accelerator of ATI cards. You should leave those settings as they are. These are the clocks that the UVD section of the chip is running at. Usually (and also for this example, as you can see), those three clock infos are programmed the exact same values. If for some reason you decide to change those values, it might be a good idea to change those three clock infos to all the same values, at least.
State 3 (clock info 7, 8 and 9) is again high and optimal performance, as you can see scrolling the list box to the right again. So far, it is impossible to distinguish whether state 1 or state 3 is used for normal operation of the card. Just set the same settings for state 3 as for state 1 in this example."
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