DEFEAT the COLD BUG on the X1900XTX by Moding it.......

[hipro5]

any news about safer vgpu mod?


@George
did you see my pm?

Safer VGPU I didn't found till now though.......I'm trying to find a resistor to ground, so as someone to
"pensil" it somehow .... Tommorow when I'll have the card in my hands and not on cascade/mobo, I'll take a better look of it......

[ViperJohn]

Safer VGPU I didn't found till now though.......I'm trying to find a resistor to ground, so as someone to
"pensil" it somehow .... Tommorow when I'll have the card in my hands and not on cascade/mobo, I'll take a better look of it......

I have been looking for a easier place to make the connection as well. Have found two with both under the stock mosfet strip heatsink. There is no voltage divider in the feedback circuit that I can find. The divider is created when you add the trimmer to ground.

Also it looks like Vddq can be done the same way as Vdd just on the mosfet below Vdd but haven't had the chance to check that out.

Viper

[kiwi]

At what temperature does cold bug kick in (on average)? Will there be problems with DICE already?

[hipro5]

At what temperature does cold bug kick in (on average)? Will there be problems with DICE already?

Depends on VGA.......With this one I had cold bug when reaching -30*C.......

[kiwi]

wow that sucks

Hopefully at least vapo will be fine

[\Karting_freak]

kiwi
some can boot @ -120 without an issue

[iguanodon]

Sorry, i'll stop posting stupid questions too early on the morning. -

[zbogorgon]

I haven't read the whole thread, so excuse me, if it has already been discussed.
Does this mods help 1900XT CF master card, cause it hurts from cold bug a lot more thatn XTX?

[\Karting_freak]

it does help

[GoriLLakoS]

I haven't read the whole thread, so excuse me, if it has already been discussed.
Does this mods help 1900XT CF master card, cause it hurts from cold bug a lot more thatn XTX?

How does your master card perform in air?

[zbogorgon]

i don't know for that card alone, in CF i can do around 720 core, normal ambient, i have benched with 800 with waterblocks, open window, that is all without voltmods, only ati tool voltage adjustment.
but it has bad coldbug, -20, total corpution, i don't see anything in VGA (boot screen)

[hipro5]

i don't know for that card alone, in CF i can do around 720 core, normal ambient, i have benched with 800 with waterblocks, open window, that is all without voltmods, only ati tool voltage adjustment.
but it has bad coldbug, -20, total corpution, i don't see anything in VGA (boot screen)

You HAVE to mod it if you want more out of them......with care of caurse........

[zbogorgon]

hipro, what about that safer vgpu mod? I have read the whole thread now and I don't want to solder on that resistor.

[brandinb]

dont you search for another contact point with very low or no resistance then the resistor you are trying to solder to then use that point as an alternate?

[Overklokk]

hipro, what about that safer vgpu mod? I have read the whole thread now and I don't want to solder on that resistor.

I hawe kiled one xtx and one Master card with the vcore mod..... my solder iron is too hot for the little resistor So i started too test other solderpoint and finale find a SAFE way too doo the mod



I solder the VR on the solderbad that i marked on the picture... then its no danger too destroy the little resistor Tested on a X1900xtx yesterday and it worked realy good

[hipro5]

I hawe kiled one xtx and one Master card with the vcore mod..... my solder iron is too hot for the little resistor So i started too test other solderpoint and finale find a SAFE way too doo the mod
I solder the VR on the solderbad that i marked on the picture... then its no danger too destroy the little resistor Tested on a X1900xtx yesterday and it worked realy good

Thanks Overklokk for the help.......

[|-jokker-|]

Also a big thanks for the new spot
I was afraid that the 1 mm smd was fried in the end of the mod .

[zbogorgon]

Thank you very much Overklokk, i am sorry for your two card though

[Boble76]

I'll try these mods into my X1800XT, Augu said it should work on it. ??

[Boble76]

Dani is right now modding my new Powercolor X1900XT, He's asking what is that VDDCI-mod? Is there any mod for VDDCI?

[Boble76]

VGPU, VDD (?), VDDCI Mods were succesfully made by Dani in this evening and here is some pictures for you.

Powercolor X1900XT pictures.

I get the card back tomorrow and I'll test it a little bit.

[hipro5]

I wish you luck with the benches....

[Boble76]

Thanks hipro5!

At first I hope I can get over 800MHz core and about 900MHz for memory. We'll see..

[Boble76]

Hipro5 - Okay, I'm wondering with Dani is everything here ok? These measures is taken without any ATI drivers or Ati Tool in Danis computer.

Vcore IDLE/LOAD: 1.18V/ this is ok, I think
MEM IDLE/LOAD: 2.08V/ this one is ok too, I think
VDDCI: 1.53V How about this one? Can I put the card now into my mobo (there is drivers and AtiTool all default-settings in my Win XP...)

all the trimmers = default 50Kohm

Or should I first go in Windows by another card to do some setting in Ati Tool? Please hurry!!
--------------------------------
"...VDDCI was preset at 1.75Volts during boot......I mean trimm the trimmer at it's MAXED Ohmage, then solder it and then trimm it at 1.75Volts.......DON'T change after that the VDDCI within ATItool........You'll not gain much if any - test it a bit though..."
---------------------------------

[Boble76]

It's working something like this now:

Ati Tool ~ GPU 1.400V, Real voltage 1.500V
Ati Tool ~ VDD 2.08V, Real voltage 2.18V
Ati Tool ~ VDDCI 1.55V, Real voltage 1.65V

So, Ati Tool + 0.1V is the real voltage with my settings. Let's try these first..