How to voltmod

[temp02]

I thought that cooler looked familiar, it's an XpertVision/Palit 7600GS.

 

[W1zzard]

capacitor: no big deal .. looks like it's used for voltage stablization, its neighbour will do the job just fine

the basic approach to voltmodding is to find the voltage regulator chip, find its datasheet, find its FB pin (thats where it measures the actual output voltage, compares that to its target and adjusts if necessary), connect the FB pin via a resistor to ground (so the voltage that the vreg sees goes down and it will start compensating and you end up with a higher voltage). as resistor use a trimmer or something, start with a high resistance (250k or so) and slowly work your way down while measuring the output voltage. once you reach the last 25% on the trimmer, switch to a smaller one (if you accidentally hit 0 ohms or another very low resistance you might blow up the voltage regulation circuitry)

look at "important" components on the card, google their datasheets, read and learn

 

[GSquadron]

Alex, look here I found a 7600gs pencil mod

Yes, i know that since yesterday, but it is just like telling someone swim right there when he doesn't know how to swim. (at least i know how to swim in real life )

Thanks Temp02! I didnt know what model it was for 3 years T_T

@W1zzard
It looks to me as what you say is just like erocker's discovery

Anyway thanks to all you people. Without your help i would never learn the true meaning of voltmoding
I really apprechiate it

 

[_JP_]

@_JP_
The PSU in fact i dont know how but now is ok, so no noise from it. Really weird. Anyway if smth wrong happens i still got 20$ left to buy the new 18$ psu. The speakers were 8 euros, but the shopkeeper sold them to me for 10$
I bought the new speakers because the one i had were very old, really. (they were from the pentium II)
They were switching on and off all the time because of bad contact with the wires.
I bought the multimeter as i saw a youtube video that explained how to use it, but that was not very clear and the video not good quality.
The second reason was because one of the "ingredients" needed to voltmod was it.
I bought the multimeter and another ingredient was the resistence
Anyway i promise i will learn how to use it, but this week i am full of exams. So i should learn things fast.
I forgot to tell you that my degree in electronics is a total 0 as i am learning geo-informatics!
So i have nth to do with it, just for the pc passion

The thing is, I still think there was something wrong with your PSU, given what you said, and that you should really take some more attention to that.
If you can bother to read english, there are very good guides to use multimeters (other that on YouTube), although they are all pointless if you don't carry the electronics knowledge I mentioned before, like Ohm's Law (for starters), etc...
If you are talking about United States dollars, 10 bucks = 8 euros.
Sure, voltmods are done by altering the amount of power that reaches the core and thus regulate it with the resistors, but buying those values without any particular reference or purpose, like just because it is what it's used...isn't really a good point.

I do not mean to shatter your hopes and dreams, but this really isn't the best starting point and seeing as you can't really buy new stuff (in case this one burns), you should really think if you are up to this (like cost-benefit, for example).

 

[GSquadron]

First i converted the dollar this way:
1000 new lek = 10 dollars
But now i got it, cuz the dollar has changed quite a bit:
1000 new lek = 8.98 dollars (so i got a 1.02 discount )
So summing up i payed 8.98 dollars, cuz i payed in leks in fact, but i converted the money to make it clear to all of you. I still have not got a new job, but the cost benefit is not a big risk for me, as i am sure about my card that will be voltmodded without any problem if i understand totally how to voltmod. First of all i should learn a lot.

 

[erocker]

This guide is great! It taught me a lot on soldering. http://forums.techpowerup.com/showthread.php?t=17004

 

[_JP_]

First of all i should learn a lot.

Sure.
But ask anyone that are helping you how long it took and what was necessary to be able to voltmod with success. There's a long (very long) way to go.
Anyways, I got this for you:

Gainward 7600GS voltmod I

Gainward 7600GS voltmod II

 

[overclocking101]

to get your bios download gpu-z start it. on the page where it tells you your clock rates towards the top you will see bios ver: then a bunch of numbers then a black chip with a green arrow click the black chip and arrow it will say save to file or submit to online database save it to file and then take the file and email it to me using the attachments my email: overclocking101@charter.net ill see what I can do with it. if you insist on voltmods you need to practice on something that means nothing

 

[GSquadron]

I have already sent the bios file since yesterday, read the erocker's suggestion guide, _JP_'s voltmod II, but i had problem in opening the first one i don't know why... If you know another way in opening it pls tell me. All suggestions are welcomed!

 

[_JP_]

Must be some issue with your browser, mine opens that link without any problem.
I guess both are mostly the same, being the same GPU, just different approaches to the matter.
I like the 2nd one more, though.

And if you read the 2nd one, I'm sure you noticed the improved cooler the publisher had to use and the potentiometers, instead of random resistors.

 

[overclocking101]

so I got the bios working on it now, ill get it back to you asap

 

[GSquadron]

Ok, but for what is it needed anyway?

 

[fitipaldi]

@Aleksander Dishnica;
For what BIOS is needed for? Click
This means that in BIOS you can change stuff like GPU/MEM/../ MHz and voltage.



Anyway, I have a nother thing I'd like to ask.

Nvidia GF7300GT. Yess you read correctly. 5 year-old graphic I found in the arcaive!
And as a joke I tryed to O.C. it, and quite fast ran out of MHz in MSI Afterburner.

Sence this wasent max O.C. I tryed luck with EVGA Precision, and ended with;

540 MHz (original: 350 MHz, overclock: 54%)
432 MHz (original: 333 MHz, overclock: 30%)
Now, this is max without any V-mods but V-mod is exacly what i want to try next, but I never found right mod for my PCB.
Now i'd like you to help me find what to connect to what so i could do this Vmod. If possibe for both GPU and MEM.

I'm no new to V-mod's but I can't see what solder to what.

And PCB picture;




PS: Sorry for my bad english.

 

[JrRacinFan]

I THINK you would want to focus on this area.

But that's just my .02, I never voltmodded before.

 

[fitipaldi]

I think so to. One of those 8 legs need to be conected to someting.

 

[JrRacinFan]

I think so to. One of those 8 legs need to be conected to someting.

I think that's going to be for vGPU and am having a hard time locating what I am thinking what I beleive is vMEM.

 

[fitipaldi]

I don't have a clue for vMEM. That's whay i'm here. =)

 

[JrRacinFan]

I don't have a clue for vMEM. That's whay i'm here. =)

Wish I could help you more but my vmodding skills are slim.

 

[fitipaldi]

No problem, maby someone else know's what to do. Thank you for your help. =)

 

[GSquadron]

From all i learned from this thread is this:
If you can connect a potentiometer to that vmem, 15k Ohm, than you can adjust the resistence manually. What is the most interesting thing is that when i went to buy this KIND of potentiometer the shopkeeper said they are out of standart anymore...
All is very simple! I got all things thanks to the replies of our friends in TPU. Now this kind of potentiometer, is used in 7600GS voltmod, so for 7300GT it would be somewhat different or maybe the same. Use a multimeter and see what results it gives to you. Than the result would be old voltage * (new resistence/old resistence). That is really simple. And i already got what is bios cuz this thread is a bit old for now and i am still waiting someones answer to the bios i gave him....

 

[fitipaldi]

All you need is multiturn trimmer at the right ressistece.

 

[fitipaldi]

Sorry for duble post.