ATI 4850/4870 voltmod thread

[Vatos_locos]

pff done it

[initialised]

Any chance one of you could clock match the 4890 (850/900) and do a couple of benchmarks vs stock 4870?

[syl]

Any chance one of you could clock match the 4890 (850/900) and do a couple of benchmarks vs stock 4870?

3DMark06:

[kemo]

Any chance one of you could clock match the 4890 (850/900) and do a couple of benchmarks vs stock 4870?

It is 850/975

[syl]

pff done it

Great job finding the pin-out diagram Looks like my original "shot in the dark" mod was a bit off the mark...it's working much better now

I've updated my orignal post with your new info and all due credit

BTW, what clocks are you running with 1.4v? I can only get up to 880mhz Furmark stable.

[Vatos_locos]

Great job finding the pin-out diagram Looks like my original "shot in the dark" mod was a bit off the mark...it's working much better now

I've updated my orignal post with your new info and all due credit

BTW, what clocks are you running with 1.4v? I can only get up to 880mhz Furmark stable.

thanks m8

same shi(f)t here i can get 880Mhz with 1.5Vgpu and then i get full of artifacts
my card seems that is not a good overclocker at all
are you using a different bios or the original one ?

[initialised]

Thanks, looks like 850MHz does not give a 20% gain over the 4870

[syl]

thanks m8

same shi(f)t here i can get 880Mhz with 1.5Vgpu and then i get full of artifacts
my card seems that is not a good overclocker at all
are you using a different bios or the original one ?

Now up to 910Mhz Furmark and 930Mhz 3DM06 stable with 1.5V...Mosfets get really toasty running FM though.

I'm using the original bios but it's been modded for higher Overdrive limits.

[fng77]

pff done it

Hi guys!

Have you figured out another vcore pencil-mod for this card as well?

Please let me know if you do!


Yours // fng77