ATI 4870X2 voltmod thread

[emertX]

I can't use riva for the fan? It doesn't detect my Fan, don't know why?

Sorry for OT!

btt

[T_M]

http://forums.vr-zone.com/showthread.php?t=323750

[emertX]

Oh man...thank you for this explanation!!!
It's been great!

[spl]

Here's one modded card rekitted for hardcore air testing:

nice job!!!!!
how many mhz plus??

[T_M]

Wow, these are the first video cards to push my 1kW Silverstone PSU to its limit.
Ater modding the second card, i got repetative system reboots at the exact same spot in canyon '06.
After a lot of testing each card seperately etc, i realised maybe my PSU was kicking, so i unplugged a water pump that was connected but doing nothing and suddenly i got stability again.
So now my whole water system for CPU is running on an el'cheapo POS PSU, and the system is finally ready for some volt modded benching.
Just trying to stabailise 860/1020 '06 now.

[Oliver]

ya they leech some pwr, they are hungry

Looking forward to see some action from you

[spl]

in the afternoon i make the vgpumod for one card!!!
i am very happy
same water temp. before 900/900 now with 1.35v 950/900

[spl]

1.4v 960mhz 4 time 2003 no stop no problem !!!!!

[T_M]

Hmmm, even with the subtraction of the water cooling from my PSU, it still trips running vGPU = 1.43V

[dinos22]

1.4v 960mhz 4 time 2003 no stop no problem !!!!!

woooow man
nice card dude

[Riska]

I am about to make a vmod guide for the HD4870X2 card and i have found the magic solderpoint on the back for the gpu in front of the card so now u dont have to solder to the 9t leg of the small IC stay tuned for more comming up in a hour or 2

[Micutzu]

Damn curious, i've spent an hour looking for it.

[Riska]

U cant nearly not se it

[dinos22]

I am about to make a vmod guide for the HD4870X2 card and i have found the magic solderpoint on the back for the gpu in front of the card so now u dont have to solder to the 9t leg of the small IC stay tuned for more comming up in a hour or 2

can you PLEASE post the photo here

this solder point to the leg is ridiculous

[dinos22]

hey SPL what's the trick with your setup
you seem to have flashed the bios to 900MHz core

let us all know please

[Riska]

http://www.octeamdenmark.com/forums/...5573#post25573

Here is my vmod and flash guide of the HD4870X2 card and the pic of the newly found solderpad on the back of the card is in the guide.

[dinos22]

http://www.octeamdenmark.com/forums/...5573#post25573

Here is my vmod and flash guide of the HD4870X2 card and the pic of the newly found solderpad on the back of the card is in the guide.

thanks man
that's genius

[G H Z]

Good job Riska

[cowie]

yeah much easier then the leg of the ic
what you guys think???
small wire in the hole for solder points and cover with metal paint?
or is that just stupid thinking?

[spl]

hey SPL what's the trick with your setup
you seem to have flashed the bios to 900MHz core

let us all know please

not being a magician I have flash to 900, after push with amdgpuclock and the voltage up to find one established!!

[r1rhyder]

spl, when are you going to give us a run using both cards?

[Riska]

Guys we need to fin the Vmem mod i have found out of the place it might be in but i am not sure!

Is there someone how can check it out?

[largon]

Eventhough R680 has a bit different vMEM component layout the Volterra chip should have compatible pins...
My bet is either of these two is the right spot. The left dot looks more likely, but can't tell for sure without better pics.

[Riska]

I get my card in this week so i will check it out

[zorro2010]

And is there any way of softvolmod on 4870X2? I have Crossfire X (2*4870x2) with ASUS Top Bios. I've tried GPU Voltage Tuner v.1.4. But it allows me to change voltage only on 2 cores of 4. Other 2 cores can't be voltmoded