ATI 4850/4870 voltmod thread

[keninishna]

I have a volt mod on my 4870, but I have a strange problem. I can bench on 850/800, and on 650/1150, but when I clock both the memory and core, the max I am stable is 800/940. VDDC is 1.307v idle and 1.363v load. I think it's OCP ( over-current protection ), but I'm not certain that is the case.

I'm having the same issue my memory goes up to 1200 with core at 750 but I can get my core up to 880 with memory at 750. but something like 860/1000 is completely unstable. I'm trying to do the memory volt mod to see if I can get some sort of stability but I'm not sure about the memory voltage reading for vddc I read 1.5 volts. I have 1.47 volts on the core now. Its wierd though I can get 880 core and 1150 memory artifact free in ati tool but drivers crash in 3dmark