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Volt mod for the 7900gt

post #1 of 5
Thread Starter 
I didn't see this anywhere so I thought I would share.

I was looking for a volt mod for the 7900gt after hitting a wall in my current overclock of the card and found out that it has over volt protection. I also found that a few people managed to trick/disable the OVP here’s the link. (Link). I take no credit for any of this just thought some of you might want to know.

While I’m here here’s the links to the 7900GTX and 7600 volt mods though I have no idea if this same problem exists (or others). (Link)

For a quick summery if you don’t want to read the post there are currently a few different ways to do this (not all of them tested)

Method 1:

Attachment 22211

Remove indicated resistor and replace with a 50KOhm variable resistor. This has been done on a few cards.

Method 2:

Attachment 22212

The picture pretty much says it all. I’ve only seen one person currently to try this and they only did it on “B†and “C†but it did work.

Method 3:

Attachment 22213

This basically assumes that pins 22 and 32 are connected to ground and therefore you can use them instead of going out to a ground. I personally find this method interesting and am looking at the possibility of a way of doing this that’s reversible.

Method 4:

Attachment 22214

The picture pretty much says it all and this was what Shamino put up so I trust it to work.



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post #2 of 5
Quote:
Originally Posted by TDA
I didn't see this anywhere so I thought I would share.

I was looking for a volt mod for the 7900gt after hitting a wall in my current overclock of the card and found out that it has over volt protection. I also found that a few people managed to trick/disable the OVP here’s the link. (Link). I take no credit for any of this just thought some of you might want to know.

While I’m here here’s the links to the 7900GTX and 7600 volt mods though I have no idea if this same problem exists (or others). (Link)

For a quick summery if you don’t want to read the post there are currently a few different ways to do this (not all of them tested)

Method 1:

Attachment 22211

Remove indicated resistor and replace with a 50KOhm variable resistor. This has been done on a few cards.

Method 2:

Attachment 22212

The picture pretty much says it all. I’ve only seen one person currently to try this and they only did it on “B†and “C†but it did work.

Method 3:

Attachment 22213

This basically assumes that pins 22 and 32 are connected to ground and therefore you can use them instead of going out to a ground. I personally find this method interesting and am looking at the possibility of a way of doing this that’s reversible.

Method 4:

Attachment 22214

The picture pretty much says it all and this was what Shamino put up so I trust it to work.


Have you done this to your card, and if so what are the results.
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post #3 of 5
I used the pencil version to volt mod. I only got a .2V increase on the Vcore and a .25 increase on the MemCore. So, I have 1.4V Core and 2.27V Mem. I was looking for 1.7V and 2.3V, so I am going to have to get a variable resistance resistor.
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post #4 of 5
Quote:
Originally Posted by pauldovi
I used the pencil version to volt mod. I only got a .2V increase on the Vcore and a .25 increase on the MemCore. So, I have 1.4V Core and 2.27V Mem. I was looking for 1.7V and 2.3V, so I am going to have to get a variable resistance resistor.

how do you do the pencil mod?
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post #5 of 5
Yes, how DO you do a quick, simple, reversible pencil mod?
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