Everybody's overclocking these days. Every Nvidia user should have and know Coolbits! If you're searching for it, it's on the first page right here for you. Not only do I have coolbits but I have the lines to give you the AGP settings panel and the refresh rate override panel. Late edition was the Additional info tab which was submitted by Krick. Thanks man for letting me know about this additional hidden tab.

September 2, 2004 update:
Several new hidden tweaks/features have been submitted by users over the months since this article was originally posted. Today I'm adding these extras for you all to enjoy! To get all of these features to work right you will need to have driver version 55.xx or higher. We always suggest keeping your video drivers as up to date as officially available (avoid the betas most of the time).

If you don't know what they are:

NVIDIA has built several tools into their drivers that they don't want normal users to use. The overclocking tool is the most important one. Any of you wanting to overclock your Geforce should use this tool instead of anything like Powerstrip that you have to pay for. I'm covering this today because it's STILL asked rather frequently around the forums.

Create a new .txt file and copy/paste the regedit info.

<-- Start copy at REGEDIT4 line -->

REGEDIT4

[HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\Global\NvTweak]
"CoolBits"=dword:00000003
"NvCplEnableHardwarePage" = dword:00000001
"NvCplEnableAGPSettingsPage" = dword:00000001
"NvCplEnableAdditionalInfoPage"=dword:00000001

"CinematicPageState"=dword:000000ff
"DisableApplyColorsAtStartup"=dword:00000000
"NoMenus"=dword:00000000
"NoPages"=dword:00000000
"NvCplAllowForceTVDetection"=dword:00000001
"NvCplCustomResConfig"=dword:00000000
"NvCplDisablePerfQualPage"=hex:00,00,00,00
"NvCplDisableRefreshRatePage"=dword:00000000
"NvCplDisableRotateAngles"=dword:00000000
"NvCplEnableActiveApp"=dword:00000001
"NvCplEnableAdditionalInfoPage"=dword:00000001
"NvCplEnableAGPSettingsPage"=dword:00000001
"NvCplEnableClearViewPage"=dword:00000001
"NvCplEnableDesktopOverlapPage"=dword:00000001
"NvCplEnableFanControl"=dword:00000003
"NvCplEnableFrameSyncPage"=dword:00000001
"NvCplEnableHardwarePage"=dword:00000001
"NvCplEnablenForcePage"=dword:00000001
"NvCplEnableOverlaySpanControl"=dword:00000001
"NvCplEnablePwrMzrOnDesktopMenu"=dword:00000001
"NvCplEnableRotationColorSettings"=dword:00000001
"NvCplEnableScreenMenuPage"=dword:00000001
"NvCplEnableTroubleshootingPage"=dword:00000001
"NvCplExposeWin2kDualView"=dword:00000001
"NvCplNvThermPage"=dword:00000001
"NvCplTvLocaleAutoDetect"=dword:00000001
"NvCplThermalSettings"=dword:00000020
"OverlayPageState"=dword:00000000
"PowermizerPreferences"=dword:00000000
"QTwkEnableModeChangeWarning"=dword:00000001
"TwinViewCapsOverride"=dword:00000001

<--End Copy above this line -->

A surprising number of people are having trouble figuring out what to do with the registry copy/paste so HERE's a link to the .reg file.

rename that .txt file to a .reg file and double click it. You'll see this message:

Click Yes!

Now that that's done you may have to logoff and log back on for the registry changes to take affect. I didn't have to.