I enabled the agp settings using the coolbits+.reg file. Lets me enable fast writes but whenever I reboot the setting is gone I need to re-enable the option everytime Ii reboot. Is there any registry trick to fix that?

check if fast writes in your BIOS is enabled

Can anyone help me?
my graphic card supports fast writes, but from some reason, there isnt any option about it in my mother board's bios..
how can i enable it?

my board is Gigabyte GA-6OTX
thanks for advance

If you check the fastwrites option in the nv control panel this setting is not automatically applied after a restart of Windows. You can enter a special registry setting to let fw be enabled every time windows boots up. If you use Windows XP you need to find your video cards settings key (the one where all those ogl_ and d3d_ entries are placed) under
HKLocalMachine\System\CurrentControlSet\Control\Video.
Probably there are severel subkeys so you need to find the active one. When you found it you go create 2 Dword values named EnableAGPFW and EnableAGPFWStrap and set both to 1. In 9x you have to set these entries under
HKLocalMachine\Software\NVIDIA Corporation\Global\System
(Dwords as well). That should do the trick. However this only works if Fastwrites are enabled in the BIOS.

@S2K which chipset is on your mobo?

My chipset is is intel's i815EP

oops sorry, intel is not my world. I'm afraid I can't help you out. I'd know how you could probably get it done on a Via chipset. But on the other hand it's not that bad. Fastwrites have virtually no influence on performance (at least I didn't notice any).

even if you can't enable FW it's not that problem ... when I had the first time to choose between on/off I did some benchmarks and had lower result with this feature enabled .... and even it help your PC it won't speed up your PC the % of influence of this setting is simply toooooooo low

How to find the active subkey?

Thx again for ur help I.C. Wiener.

Thanks anyhow

i really appreciate it.

Tried running the latest Intel Chipset install utility? It may need newer AGP drivers for fastwrite support.

Also check for a newer mainboard bios, to see if they added an option for FW in the bios.

Finding the active registry key is quite easy: Just change some settings in the nvidia controlpanel and look under which registry key the values behave accordingly. I.e. if you change the vsync option for OpenGL you might want to look for the "Ogl_DefaultSwapInterval" registry entry. If the values of this one are changing, you found the right key. Besides I think the active key has yet another subkey called "Volatile Settings", but I'm not sure about this.
Btw: Did I mention that Sideband Addressing can be enabled the same way? The proper DWord value here would be called "EnableAGPSBA" (set to 1). I need to use this for my Geforce2 Pro, cause it disables SBA by default.