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Can someone explain to me the purpose and how to volt mod

post #1 of 5
Thread Starter 
hey guys, hows it going?

I really want to try all this out but what is the best way to go about it?

I know a little about electronics, but could you guys explain this "Volt modding" to me in greater detail.

I have a Asus eah 4850 that I want to try this on but I don't know the theory or what to use. I have a digital multi meeter and soldering iron and a few other things but the know how and why.

I would like to thank you guys in advance for any input.
post #2 of 5
Hey, the idea with voltmodding is that by raising the voltage of the GPU and/or memory you end up with a higher overclock, providing the cooler can cope with the extra heat.

With the 4850 it's very easy to Vmod and you won't need any hardware modifications, so no soldering iron, no multimeter (of course if you wanna take precision measurements, you can, but it's not necessary as all modifications are in software).

For the 4850 here's what I did on mine:
*I left the memory voltage alone as in testing I've seen the card doesn't quite benefit from faster memory
*I used a BIOS vmod to raise the Vgpu by 0.1V. For this, I have used "ati winflash" to save by stock BIOS, I modified the Vgpu with "RBE" (they have a great tutorial on how to do it) and used again "ati winflash" to put the modified BIOS back on the card.

The result was a ~70MHz higher GPU overclock and a pretty significant heat output increase. While before I used the Accelero S1 in passive mode, afterward I had to place the two fans of the turbo module to keep the card below 80°C.
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post #3 of 5
^ about vmod.

and yeah as dragosmp explained its all about pushing ur card further.
some cards carnt raise the volts through software.. so you have to volt mod it.

:]
    
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post #4 of 5
By locating the voltage control IC in a GPU's power circuit, you can solder in a potentiometer to give you "adjustable" voltage control over the device. It sounds like hardware engineering and rocket science..but once you get into it a few times, its nothing more than a few minutes on the internet followed by some soldering..and the occasional trip to Radio-Shack for more potentiometers

*heres the backside of some reference 4850's I did for a client



heres a pic of non-reference models before I sold them

post #5 of 5
^ or that xD
    
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