ATI 4870X2 voltmod thread

[G H Z]

They are 43x43 afaik

[largon]

rdrash,
Thanks for pics, but to see things...
...we need higher resolution images taken from a shorter distance with no camera flash. Such as those elmor posted in post #2, but of the backside.

[rdrash]

rdrash,
Thanks for pics, but to see things...
...we need higher resolution images taken from a shorter distance with no camera flash. Such as those elmor posted in post #2, but of the backside.

Ok..sorry about those crappy pics. I will try to get some good ones before the end of the weekend. Did I atleast get the right areas?

[largon]

Yup, you got pretty much the right places.
If the camera is capable, macro the areas inside the red squared:

[jimmyz]

Sorry so late to post, I assumed when Elmor posted his pics you guys had all the info you needed. if someone wants to check something with a multi meter PM me.

I have V-Mod info, Please PM if you want to test it. I do not have a card here and need to confirm resistance

[largon]

The issue is there's no feasible soldering point on the frontside. The mod itself should be "50ohm VR from pin#9-to-ground" as stated earlier?

[jimmyz]

The issue is there's no feasible soldering point on the frontside. The mod itself should be "50ohm VR from pin#9-to-ground" as stated earlier?

I should have been more clear. I have the spots to check on the backside. Thanks to W1zzards excellent pics. Visit Tech Power-up and check out his revierw. He generally includes Hi-res pics for us modders. http://www.techpowerup.com/reviews/S...4870_X2/3.html

I do not have a card here so please test before modding. I am not responsible if your card is damaged, please only test if you are comfortable with the risk. Any results or questions I will check in later tonight.

Check from the mod points indicated to ground. multi set to low range. the resistance should be around 2.5 ohm .Voltage read points, of course need to be checked while card is functioning.

Ignore the part about Elmors reading in the pic. I thought he said what resistance , he stated 50 ohm to ground which is for a resistance of roughly 2.25 ohm (resistance X 20 = size of VR recommended) so 20 x 2.25 = 45 ohm so a fifty is fine.
[IMG][/IMG]

[IMG][/IMG]

If the resistance is within spec these should be the mod points. as Elmor stated it should be a 50 ohm VR. PLEASE test before modding, these may not be the proper points!!!

[C-N]

Jimmyz I measure 2.7 ohm's on your 1st picture (the one near the letter D) & 1.6 ohm's on your 2nd picture (the one near the letter U)

I also checked the continuity through the board to the pins marked by the green arrow in my pics below. I don’t have the schematic for the VT1165MF chip but my marks are in 2 different places which obviously can’t both be pin 9.

Also has anybody looked into memory volt mods yet?

This 1st pic is the VT1165MF chip near the PCI-E power connectors



This 2nd pic is the VT1165MF chip near the Pulse chip.

[jimmyz]

will look into this thanks for the info.

[Riska]

Anybody found the right vmod soldrings points??

[zbogorgon]

I should have been more clear. I have the spots to check on the backside.

I do not have a card here so please test before modding. I am not responsible if your card is damaged, please only test if you are comfortable with the risk. Any results or questions I will check in later tonight.

Check from the mod points indicated to ground. multi set to low range. the resistance should be around 2.5 ohm .Voltage read points, of course need to be checked while card is functioning.

Ignore the part about Elmors reading in the pic. I thought he said what resistance , he stated 50 ohm to ground which is for a resistance of roughly 2.25 ohm (resistance X 20 = size of VR recommended) so 20 x 2.25 = 45 ohm so a fifty is fine.
[IMG][/IMG]

[IMG][/IMG]

If the resistance is within spec these should be the mod points. as Elmor stated it should be a 50 ohm VR. PLEASE test before modding, these may not be the proper points!!!

the top one's resistance is 2.7 and 50ohm VR does the trick,
the botom one's resistance is 1.7 and 50omh does nothing, so prob wrong point

[Oliver]

Thanks ghz, i got information from pmp

[jimmyz]

Sorry guys, Had a big holiday weekend here in the U.S. I looked everything over again and all i can suggest is checking resistance of this point to check it.

[IMG][/IMG]

Photo courtesy of Tech Power up. http://www.techpowerup.com/reviews/S...4870_X2/3.html

[CCC]

pic/info of the mods below

from mouse
for gpu#2 you have a solder pad point on the backside as stated in the guide at XS

for gpu#1 solder directly to pin#9 of the ic controller

jason said to use a mag headset and a needle point sodler iron tip and once the wire is soldered to cover with hotglue and or AA epoxy as the area is so small/tight you dont want the wire to come loose and or break off

Ill try take pics of the cards when I install EK blocks when they come in stock.

The cards with fans at 100% have no problem at 860/960 inside the case with vgpu on both set at 1.305v load

[zbogorgon]

do you have a pics of that pin#9 soldering ?

[kenblat]

@zbogorgon: those pin so tiny and it's really a pain in the ass for finish this connect

i use a pair of 500 Ohm VRM coz i don't have any lower available on hand. Now we happy with the result. Our card is suck 1.10V idle mean 1.33 Full load stuck @ 820/950 . Anyway, if any one find out another better spot pls sharing us here, i think due to the super thin wire may be when down to sub zero this connection will be apart anytime

[zbogorgon]

that's for sure that I won't be soldering this, but I will try to find beter spot

does anyone know resistance from this point to ground without vmod ?

[kenblat]

that's for sure that I won't be soldering this, but I will try to find beter spot

does anyone know resistance from this point to ground without vmod ?

mine yell out ~ 2.9Ohm compare to 3.2Ohm of the first GPU

Before do the pin9 direct solder, i do have try alot for find out another spot, but i'm a looser ... hope that you can help us

[Sectorz]

Someone think a pencil mod will be possible ?

(Sorry for my bad english)

[S_A_V]

Someone think a pencil mod will be possible ?

(Sorry for my bad english)

Impossible, Rfb resistance is too low for pencil mod on this card.

[Sectorz]

sh*t it 100% sure ?

Can we add more voltage with a flahs bios ? (exemple the 4850 1.15 to 1.21)

[Norway]

You can try out this one

LINK

[Sectorz]

How I can gain max with a bios flahs ?

[Norway]

upper the clock speed and volt, and chill the card better

Howto:

Flash so the volt is 0.05v or 0.1v more then default and clock it with a app. and test it with furmark for stability, now you need to flash the bios again with the new clock speed's.
I belive it is one bios for each GPU so flash master and slave GPU

[Sectorz]

Sorry you have miss understang me, How many volt I can won with a flahs bios ?

exemple 4850 4850 1.15v to 1.21v with a bios flahs but 1.26 to how with a 4870x2 ?