Vmod X1900XT

[Harpoon]

Prompt please, where I can take the circuit vmod X1900XT.
Where points of measurement on a videocard and where to solder resistors?
Searched in the Internet for very long time, nothing has found.
And also the question, whether will help this vmod increase mhz?
I want to put approximately 1.75V on GPU.

[Overklokk]

Prompt please, where I can take the circuit vmod X1900XT.
Where points of measurement on a videocard and where to solder resistors?
Searched in the Internet for very long time, nothing has found.
And also the question, whether will help this vmod increase mhz?
I want to put approximately 1.75V on GPU.

http://www.xtremesystems.org/forums/showthread.php?t=92444

Therw you hawe all mods for x1900 cards

[Harpoon]

Overklokk
Can I here at you ask, whether probably if to make vmod of a videocard up to 1.75V,
Whether gpu will work on frequency 850MHz?
Videocard Sapphire Radeon X1900XT 512Mb 1.1ns
Videocard I am going to cool by self-made system water
Coolings. Whether it will sustain? At a voltage 1.6V it showed temperature of 68 degrees.
But at me the frequency gpu above 730MHz even did not raise at 1.6V. Whether there will be a progress at 1.75V.
Very much I wait your answer.

[G H Z]

I doubt more voltage would help in your case without better cooling.

[Harpoon]

G H Z
But maximal temperature of a videocard in loading of 68 degrees.
And at it a limit I think 90-95 degrees.
Why? It is necessary to put freon gas R22?
Speak also that a raising of a frequency be higher 720Mhz can by a problem
For the trunk PCI-E. It is necessary to increase frequency of the trunk PCI-E? On how many?

[G H Z]

I may not understand you exactly but yes, R-22 cooling or similar would make much more of a difference. I have seen many air cooled cards with vmods that didn't react well past a certain point without better cooling, it's just the way this game goes. For PCIe frequencies I would say up to 115-117 is safe and will in some cases help card overclocks, much beyond this and you risk loosing the OS due to file corruption.

[Harpoon]

G H Z
And tell please, why at cooling a videocard by gas R-22 is improved OC of ability of the chip?
You can to me it explain?
And why the videocard can not be large OC even at temperature of 68 degrees and water cooling?

[G H Z]

Well thats just experience. Overclocking comes down to cooling, voltage and silicon/component quality. There are thousands of examples of this in action right here. But the real answer is only left to actually try it. 68° is not a cool running card and if it hits a peak there as I said more voltage without better cooling is not likely to do much.

[Harpoon]

G H Z
Means to me to fail to disperse this videocard at water cooling more
By what 720MHz on GPU?

[halo112358]

Are you really going to see lower temps on an x1900xt without TEC or chilled water (or phase)? These things run @ stock loads around ~95'C.

I load @ ~73'C with a zalman vf700 :P

[Harpoon]

I do not want to see temperature less. I simply want that mine GPU will be OC
It is more than 720MHz. Really it is impossible?

[Harpoon]

Please people!!! Help me!