Radeon X800 Non-Pro/X800 XL/X850 Voltmods

[Mussels]

mine read as 1.43V at stock, that would push 1.6V+ right? i'm on an ATI5 silencer here... will that be enough?

(i'm still trying to figure this mod out)

 

[Urlyin]

mine read as 1.43V at stock, that would push 1.6V+ right? i'm on an ATI5 silencer here... will that be enough?

(i'm still trying to figure this mod out)

In the pic the SMR are connected to the VID pins of the FAN5240. The different combinations create different voltages. It's not adjustable, if you set the VID up to 1.45 then that's what you get. Mussels look at the first page where W1zz just added a new pic with the VID chart and on your card locate the resistors that are on the board. Using the chart deterrmine what the voltage should be... I'm assuming you're default is 1.40v so you should have resistors at VID0,VID1 and VID4. You would try to pencil the solder pads for VID2 which would change the voltage to 1.60v... keep an eye on the temp... you'll want it to stay below 70c even though the core temp is spec'd higher... let us know how you make out....

 

[ViperJohn]

In the pic the SMR are connected to the VID pins of the FAN5240. The different combinations create different voltages. It's not adjustable, if you set the VID up to 1.45 then that's what you get. Mussels look at the first page where W1zz just added a new pic with the VID chart and on your card locate the resistors that are on the board. Using the chart deterrmine what the voltage should be... I'm assuming you're default is 1.40v so you should have resistors at VID0,VID1 and VID4. You would try to pencil the solder pads for VID2 which would change the voltage to 1.60v... keep an eye on the temp... you'll want it to stay below 70c even though the core temp is spec'd higher... let us know how you make out....

To add to the above the VID programming pins are purely an on/off logic function. ATI uses resistors
on the x800XL and x850 as a easy way to reprogram the regulator voltage during PWA stuffing should
it ever be needed. You can just jump (Circuit Writer Pen) the solder pads.

Both the 9800XT and the x800 AGP card use(d) the Fairchild FAN5240 regulator and use(d) traces on their PWA's to connect the required VID pins together.

Viper

 

[Urlyin]

Thanks Viper...

 

[Mussels]

that could make a simple solder mod to remove those resistors and shuffle them around....

and yes i get the idea, and had already looked at the pic.

and i'll check mine, and see what needs to be done later my bro kinda killed my winnie 3200+ and a neo2 plat board, so i've got people to kill and RMA's to do today...

 

[Smultron]

Tijgert: Dropped you an email regarding to modding Club 3D X800 PCI-E, Dual DVI, VIVO to 16pipe XL model.

You seem to have that Club3D XL model allready... could you send me the original bios of that card?

I ordered yesterday the Club3D X800 PCI-E card and i´m wondering if the 12-->16 pipe mod could be done to this card. The PCB:s seem to be identical according to pictures published by Club3D.

Anyone has advice if and how the flashing could be done? ...if i do the flash with the modified flashrom and the XL-bios should all the 16 pipes be activated or do we need some kind of a special bios?

 

[Mussels]

it could be laser cut, in which case its impossible to unlock.

(like the non-ViVo X800PRO cards)

 

[Urlyin]

that could make a simple solder mod to remove those resistors and shuffle them around....

and yes i get the idea, and had already looked at the pic.

and i'll check mine, and see what needs to be done later my bro kinda killed my winnie 3200+ and a neo2 plat board, so i've got people to kill and RMA's to do today...

Dang... Sorry to hear Bud ... but in referrence to the VID mod,the SMR are way to small to remove and resolder. It can be done but it is very difficult... best to try the pencil first, which may be able to create the bridge but most likely you'll need to do what Viper said and use a conductive pen (Circuit Writer Pen)....

 

[AllBrain]

Originally Posted by http://www.marsport.demon.co.uk/smd/res.htm
The first two (or 3) digits are the first two (or 3) digits of the resistance in ohms, and the third(or 4th) is the number of zeros to follow - the 'multiplier'.
Three Digit Examples & Four Digit Examples
330 is 33 ohms - not 330 ohms
1000 is 100 ohms - not 1000 ohms
221 is 220 ohms
4992 is 49 900 ohms, or 49.9 kohm
683 is 68 000 ohms, or 68 kohm
16234 is 162 000 ohms, or 162 kohm
105 is 1 000 000 ohms, or 1 Mohm
0R56 or R56 is 0.56 ohms
8R2 is 8.2 ohms

So if the resistor I pencil to increase the voltage on my Gecube X800XL says 182 on the top, then it should be 1800 ohms. What size variable resistor should I use if I want to make a more permanent vmod?

 

[Urlyin]

So if the resistor I pencil to increase the voltage on my Gecube X800XL says 182 on the top, then it should be 1800 ohms. What size variable resistor should I use if I want to make a more permanent vmod?

Hi AllBrain .... that would be correct .... this is for the VGPU?

 

[AllBrain]

Hi AllBrain .... that would be correct .... this is for the VGPU?

You have it right there Urlyin. I have one of those funny PCB's. What size would your recommend?

 

[Kramdra]

Thanks for testing the VID mod for me, I havent had time yet.

To do the resistors, I would recommend using SMD 1k ones, (0805 size).

There are two ways of using SMD resistors:

1) Put a very small blob of super/other glue in the middle (not on the ends of the resistor) and just push it down with a pair of tweezers so that the ends make resonable contact. I think this is the best way, partially becuase it can be removed and noone will ever know if you send it back, where as they will if you paint it. Might be easyer to put the glue betwen the solderpads. After glueing it down, its a good idea to cover with hotglue or something to protect it.

2) Soldering them was quite hard for me but I am using a 1.5mm tip on a cheap 30w iron (£5 from maplin).
With a 18w iron with 0.5mm tip it should be really easy..
Ive done a few tests with a dead 9700 on some very similar solder pads and It took a while.. the reistor was hot for about a minute (stuck to the soldering iron tip, lol) but it works and measures 1k.


Pencil doesnt seem to work atall on these cards, I think becuase the solder pads are bumpy instead of flat.. If they were flat then the pencil line would be straight and not curved over the surface.
I would not use conductive paint... they're must be a reson why they used 1k resistors...

 

[Urlyin]

Thanks for testing the VID mod for me, I havent had time yet.

To do the resistors, I would recommend using SMD 1k ones, (0805 size).

There are two ways of using SMD resistors:

1) Put a very small blob of super/other glue in the middle (not on the ends of the resistor) and just push it down with a pair of tweezers so that the ends make resonable contact. I think this is the best way, partially becuase it can be removed and noone will ever know if you send it back, where as they will if you paint it. Might be easyer to put the glue betwen the solderpads. After glueing it down, its a good idea to cover with hotglue or something to protect it.

2) Soldering them was quite hard for me but I am using a 1.5mm tip on a cheap 30w iron (£5 from maplin).
With a 18w iron with 0.5mm tip it should be really easy..
Ive done a few tests with a dead 9700 on some very similar solder pads and It took a while.. the reistor was hot for about a minute (stuck to the soldering iron tip, lol) but it works and measures 1k.


Pencil doesnt seem to work atall on these cards, I think becuase the solder pads are bumpy instead of flat.. If they were flat then the pencil line would be straight and not curved over the surface.
I would not use conductive paint... they're must be a reson why they used 1k resistors...

To add to the above the VID programming pins are purely an on/off logic function. ATI uses resistors
on the x800XL and x850 as a easy way to reprogram the regulator voltage during PWA stuffing should
it ever be needed. You can just jump (Circuit Writer Pen) the solder pads.

Both the 9800XT and the x800 AGP card use(d) the Fairchild FAN5240 regulator and use(d) traces on their PWA's to connect the required VID pins together.

Viper

Kramda ... did you see what Viper posted? You can just jump the pads ... besides soldering those SMR is a tuff job... The glue idea would be a pain IMHO but if it works and you can do it easily... Again thanks for the VID post even if they can not adjust the vmod they can at least bump up the vcore without soldering, which is what most of these guys are looking for ...

 

[Urlyin]

You have it right there Urlyin. I have one of those funny PCB's. What size would your recommend?

AllBrain ... Yes you do have one of the off variants that have hit the scene ... But you should still be able to use a 10k VR ....

 

[Unregistered]

Pencil doesnt seem to work atall on these cards, I think becuase the solder pads are bumpy instead of flat.. If they were flat then the pencil line would be straight and not curved over the surface.
I would not use conductive paint... they're must be a reson why they used 1k resistors...

The pencil works great for me. I scratched the solder points first with a pin to improve the contact. I'm able to change the voltage to 1.4, 1.55, or 1.6v without any problem

FBL

 

[Unregistered]

To add to the above the VID programming pins are purely an on/off logic function. ATI uses resistors
on the x800XL and x850 as a easy way to reprogram the regulator voltage during PWA stuffing should
it ever be needed. You can just jump (Circuit Writer Pen) the solder pads.

Both the 9800XT and the x800 AGP card use(d) the Fairchild FAN5240 regulator and use(d) traces on their PWA's to connect the required VID pins together.

Viper

Kramda ... did you see what Viper posted? You can just jump the pads ... besides soldering those SMR is a tuff job... The glue idea would be a pain IMHO but if it works and you can do it easily... Again thanks for the VID post even if they can not adjust the vmod they can at least bump up the vcore without soldering, which is what most of these guys are looking for ...

Whats PWA?
I assumed the resistors were used because a zero resistance might take more current than the chip can source/sink and damage it?

If not, then its definatly easyer just to jump it.

To jump it I would still not recommend pen unless you want it to be 100% permenant with no chance of sending it back under warranty...
I will try with conductive copper tape which is sticky on one side, perfect for doing this... and non permanent.. Ill hot-glue over the top as always

I think for anyone watercooled that cba with the IGPU mod, it should be good to just stick the GPU at 1.6v. It overvolts on most cards by 0.1-25v anyway.. which is just below what the OCP kicks in at?

 

[Kramdra]

Above post was mine btw..

anyone know why it always logs me out if I close the firefox..? doesnt for other forums..

 

[ViperJohn]

Thanks for testing the VID mod for me, I havent had time yet.

To do the resistors, I would recommend using SMD 1k ones, (0805 size).

There are two ways of using SMD resistors:

1) Put a very small blob of super/other glue in the middle (not on the ends of the resistor) and just push it down with a pair of tweezers so that the ends make resonable contact. I think this is the best way, partially becuase it can be removed and noone will ever know if you send it back, where as they will if you paint it. Might be easyer to put the glue betwen the solderpads. After glueing it down, its a good idea to cover with hotglue or something to protect it.

2) Soldering them was quite hard for me but I am using a 1.5mm tip on a cheap 30w iron (£5 from maplin).
With a 18w iron with 0.5mm tip it should be really easy..
Ive done a few tests with a dead 9700 on some very similar solder pads and It took a while.. the reistor was hot for about a minute (stuck to the soldering iron tip, lol) but it works and measures 1k.


Pencil doesnt seem to work atall on these cards, I think becuase the solder pads are bumpy instead of flat.. If they were flat then the pencil line would be straight and not curved over the surface.
I would not use conductive paint... they're must be a reson why they used 1k resistors...

Those are 603 spaced solder pads but you do not need to use resistors at all. Just use a Circuit Writer pen to close the pads.

Viper

 

[Slammed94]

I have a question.....

I'd like to get a 1.45 GPU volt, I can easily do 1.40, but in order to do a 1.45 I would have to open up one of the resistors. I am doing the pencil mod, but is it possible to get a 1.45 with a pencil mod? Would I just pencil them in like I did the VDD mods?

Also if I wanted a VDD of 2.25, would I need a VDDQ of like 2.28?

Are those safe for air cooling, with an AC5 Rev 2 on the XL?

 

[mikeguava]

Yes, it is crazy that some report that they can and others can not ... Do you have 16 pipes open on the Pro? that is a sweet oc stock ... You won't be sorry sending your card to Viper John... I agree on the X850 going to John if the Pro only has 12 pipes ...

Just about to get my X850XT back from ViperJohn - the process with him has been awesome! I can only recommend everyone who has two left hands like me ( I happen to right handed..) to do the same. I expect to do quite some damage to the ORB very soon.

Also I managed to mess up my attempted voltmods on the X800Pro I was playing around with - Doctor John used some of his SnakeMagic to make it fly again...

 

[Unregistered]

This may sound like a dumb question..

But when doing the mod with pots what do I set them to before installation.. ?

Do I test them with my dmm to 0 ohms.. or 20k ?

 

[Urlyin]

I have a question.....

I'd like to get a 1.45 GPU volt, I can easily do 1.40, but in order to do a 1.45 I would have to open up one of the resistors. I am doing the pencil mod, but is it possible to get a 1.45 with a pencil mod? Would I just pencil them in like I did the VDD mods?

Also if I wanted a VDD of 2.25, would I need a VDDQ of like 2.28?

Are those safe for air cooling, with an AC5 Rev 2 on the XL?

Slam .... the pencil isn't going to work with the VID at least I don't belive it will, doen't mean you can't try it. Like Viper said jumper them with a conductive pen .... the VDD of 2.25 should be fine and the PCI-E cards seem to have the same VDDQ settings as the VDD so 2.25 - 2.28 should also work fine ...

 

[Urlyin]

Just about to get my X850XT back from ViperJohn - the process with him has been awesome! I can only recommend everyone who has two left hands like me ( I happen to right handed..) to do the same. I expect to do quite some damage to the ORB very soon.

Also I managed to mess up my attempted voltmods on the X800Pro I was playing around with - Doctor John used some of his SnakeMagic to make it fly again...

Good news Mike ....

 

[Urlyin]

This may sound like a dumb question..

But when doing the mod with pots what do I set them to before installation.. ?

Do I test them with my dmm to 0 ohms.. or 20k ?

Set them to their max ... 20k ... read through this article to get some tips link

 

[Kramdra]

Im a bit confused with the VID mod.

Ive got a 1.4v stock card. I should now be getting 1.6v. When testing Ive gone to bios so it doesnt boot windows. I assume the VID will not start at 1.4 then change to 1.6v in windows/games etc.. it should *always* be 1.6?

I bridged R1856 (VID3) using sticky copper tape which is conductive. The connection is not perfect, I cant get the resistance lower than 650ohm and I think thats the reson why it *doesnt* work. The connection is probably just not good enough.

Heres a pic of it, before I redo it with solder.. pic.


Also does anyone bother to cool the chips Ive put large blue rectances around?
I dont think they make much heat - instead on the other side there is two inductors which make the heat (and they work better when hot). Ive not looked up the fucntion of these chips yet.. but it might reduce droop on Vgpu if they are cooled..?
I assume like with CPU voltage the droop will increase a lot if voltage is increased above what the circuit is designed to give.