ATI 4850/4870 voltmod thread

[makaka]

First i want to thanks celemine1Gig and ceemic for their help finding the right vmod for the HD 4870 Palit soic edition (dual bios and dual fan) ,
here is the video card picture :

The vmod for the card and the vcore measure points :


Here is some result using 2 Gb ram (470 mhz) , E8500 @ 4.2 Ghz (470x9) , p5q , 1000w psu , raid 0 :
Note : stock volt according to point above was 1.335 v (maybe palit over volted the card ). the card max stable was 800 mhz GPU and 1050 GDDR5
@ 1.44 v (load) 900 Mhz stable

@ 1.44 v (load) 920 Mhz

@ 1.44 (load) 940 Mhz

@1.5v (load) 950 Mhz

@ 1.55v (load) 960 Mhz

@ 1.6v (load) XXX??? dark screen with restart GPU voltage show -0.03 v maybe a rest or OVP ,
975 also passed the test @ 1.55v but there was a lot of artifact , so i decided to not publish the result .
Any OVP mod for my card , i am looking for 1000 Mhz benchable