ATI 4850/4870 voltmod thread

[jimmyz]

Hello .

I have done the pencil with my HD4850 and have now 1.37 volt for the GPU under water ( swiftech waterblock ) .

I flashed the card at 850 Mhz for the GPU but when i use 3dmark2006 , i have got some artefact on the last scene with snow but no freeze .

At 820 mhz GPU , no more artefact .

So , do you think the card need more voltage or is it normal to have some artefact at 850 mhz GPU ?

Did someone notice the same thing ?

It isn't normal since it went away after dropping speed. You may need a touch more voltage for 850, just keep an eye on the temps.

4870 Pencil mod? GPU or Mem

When the volt mods are confirmed properly and working then we can worry about pencil mods. Though I won't be searching for any others will. I feel a pencil mod is never the answer. hard mod only in my house. I like to be sure It is working right.