Don't raise the agp voltage
leave it at 1.5
Here is how you up your voltage to give your gt ultra performance.
Go download nvflash 4.42 or better
these commands are for v4.42:
make a bootable dos disk if you use xp, win98 works well for this,
put nvflash.exe and cwsdpmi.exe on to the floppy
boot from the disk and save you current bios with
command: "nvflash -b backup.rom"
this saves your origninal bios as "backup.rom", store it in a safe place
you have 2 choices:
1) flash with a different bios, such as an ultra
or
2)edit your own bios
(which I did and I believe it ensures better compadibility)
to flash with a different bios which you have renamed "newbios"
command : "nvflash -f newbios.rom -p -u -2"
to edit your own bios return to windows and use
OmniExtremeEdit FX v1.2 to edit your own bios.
set your voltages to what you want, some set 2d and 3d the same
I just upped my 3d voltage by .1v don't get greedy here.. it could hurt
then save this file as whatever
reboot with your disk and flash the card with the above flash command using your new file name
return to windows and see what your autodetect displays as your new max speed
run 3dmark03, 05 to see your improvement and to ensure stability at those speeds
note: your memory will probaly max around 1150-1200 don't puch it too hard, the core speed increase makes much more diff
once you find the max settings for core and mem, back them down a bit
my max with 1.4v and NV5 is 433/1150
I run at 425/1100
consider alternative cooling to chill your new beast such as an NV5
just installing one upped my max core by another 8 mhz
lets us know how it worked
more info found here
http://www.nvnews.net/vbulletin/showthread.php?t=33437
and here
http://www.nvnews.net/vbulletin/showthread.php?t=36901
sorry for cross post
and remember, you flash at your own risk, responsibility be not mine or anyone elses
IRON