Need Help overclocking an X1900-XT

[cmberry20]

ok, I've got a new PowerColor X1900-XT & wish to overclock it.
First the 2D clock & 3D clock is causing me a problem, here are my issues:
1. Does the 2D clock use less vGPU voltages than 3D. I ask this because ATI-Tool will find artifacts as soon as the core gets to 560 but the vgpu is at 1.175v.
2. When ATITool disables the 2D/3D file 'ATI2EVXX.exe' is this permanent or is the file restored/enabled after a re-boot.
3. ATI Tool (latest beta) seems to hang my system as soon as i set the core clock at more that 600. (Computer freezes apart from cursor then screen goes blank as if standby - needs resetting)

Other things i need to know is what are safe voltages for this card. At the moment its on air but i will be putting it in my water cooling system later this week (Swiftech VGA block)

Because of the problems with ATI-Tool I've been using ATI overdrive & the card seems stable even at the highest settings. However, i would like to go higher when i've got water cooling - is there a way to do this or a program that lets me overclock higher?

Cheers
Bezza.

 

[RiPsTa]

Have you tried an earlier version of ATITool because that new beta version is doing exactly the same thing with my x800gto2, doesnt detect any artifacts then just hangs for about 5 seconds and reboots the system.

 

[cmberry20]

But earlier versions of ATITool arent compatible with the X1900 cards.

 

[cmberry20]

Anyone?

 

[yogurt_21]

http://forums.techpowerup.com/showthread.php?t=8385

 

[spy2520]

i succesfully overclocked mine by just raising the voltage a little, its at 670/820 but it could go a little higher. my VGPU is at 1.4v, but i was told to put it a little higher, i think 1.425 was mentioned on another post. after that i could run the "find max" stuff until i hit the ceiling. thats on the stock cooler. and when it disables ati2evxx.exe i'm pretty sure it comes back on at reboot. you can just delete that file however.