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volt modding

post #1 of 11
Thread Starter 
I have stripped my MSI NX 7800GTX and I am going to be off to the store to buy some compressed air and eletronics cleaner because I am gonna be rebuilding my computer from the ground up with water cooling, so I think I might aswell go balls out and volt mod my gfx card aswell, is it really as easy as just soldering some resistors or is there more to it?
can someone give me some 1st hand advice on this? are all parts easily obtainable from an electronics store? should I even be considering this? thanks.
post #2 of 11
If you are any good with electronics and can solder well then by all means give it a crack. If you can't solder then you better start practising because you don't really want to be killing that vid card of yours.

On other things go to the link in my sig and post for you are an Aussie.
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post #3 of 11
Quote:
Originally Posted by MaFi0s0
I have stripped my MSI NX 7800GTX and I am going to be off to the store to buy some compressed air and eletronics cleaner because I am gonna be rebuilding my computer from the ground up with water cooling, so I think I might aswell go balls out and volt mod my gfx card aswell, is it really as easy as just soldering some resistors or is there more to it?
can someone give me some 1st hand advice on this? are all parts easily obtainable from an electronics store? should I even be considering this? thanks.

From experience its not hard at all; its pretty fun. Make sure you have variable resistor like a 5k or 3k; that can go 10% - 50% + - give and take. Note that the ground will be on the back where you plug the power supply on the card. Read from Resistor to ground for the 3d core and that should be 3k. I not sure about memory but I think it was 3k too. Note use a double sided tape to stick your variable resistor to the card. Double check your ohms before pluging your card and turning the power on. Best that you have after market heat sink. I was lucky that my 7800GT idle temp was 35c so bumping the volt was on problem. Don’t go down more that 2.7k ohms; but I did and burn out my card. But if you do burn out your card, just take out all the wires and clean it really good and turn in back in to the company and 3 weeks later you’ll have a brand new one.

heres a link were my 7800GT scored 8755 on 3dmark05 http://www.rigshowcase.com/img/26XIsKn/1617
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post #4 of 11
Wait...all you want to do is voltmod your gfx card right?? This process does not require any physical effort nor soldering mods. All you have to do is have a bootable Floppy Disk. You simply insert floppy disk, format it to make it reboot, download Nibitor and NV Flash. Copy NV Flash to the bootable floppy disk and restart the PC (with floppy inside). The PC will start and just type "nvflash -backup.rom" to backup your existing gfx card BIOS. Now boot into Windows and edit that BIOS (from floppy) with Nibitor and from there you can change the voltage that you would like. Save the edited BIOS to the floppy and reboot again. This time type "nvflash -4 -5 -6 file.rom" where "file" is the edited file name that you saved as. Reboot and you're done!
post #5 of 11
Quote:
Originally Posted by wudaddy
Wait...all you want to do is voltmod your gfx card right?? This process does not require any physical effort nor soldering mods. All you have to do is have a bootable Floppy Disk. You simply insert floppy disk, format it to make it reboot, download Nibitor and NV Flash. Copy NV Flash to the bootable floppy disk and restart the PC (with floppy inside). The PC will start and just type "nvflash -backup.rom" to backup your existing gfx card BIOS. Now boot into Windows and edit that BIOS (from floppy) with Nibitor and from there you can change the voltage that you would like. Save the edited BIOS to the floppy and reboot again. This time type "nvflash -4 -5 -6 file.rom" where "file" is the edited file name that you saved as. Reboot and you're done!
you can't flash any G70 card; that won't work.
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post #6 of 11
Quote:
Originally Posted by Mikesamuel112
you can't flash any G70 card; that won't work.
Oh, I didn't know that. But by typing in "nvflash -4 -5 -6 file.rom" nvflash will force flash the BIOS, even if the BIOS does not match (hence GPU mismatch).
post #7 of 11
Thread Starter 
And is that ment to be safe?
post #8 of 11
Quote:
Originally Posted by wudaddy
Oh, I didn't know that. But by typing in "nvflash -4 -5 -6 file.rom" nvflash will force flash the BIOS, even if the BIOS does not match (hence GPU mismatch).
You can change the voltage reading in the BIOS, but it won't actually change the voltage. It'll just show the new voltage value. The only way to change voltages on the new Nvidia cards is by hardmod. You can, however, change Ati voltages in the BIOS on their newer cards.
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post #9 of 11
Quote:
Originally Posted by sccr64472
You can change the voltage reading in the BIOS, but it won't actually change the voltage. It'll just show the new voltage value. The only way to change voltages on the new Nvidia cards is by hardmod. You can, however, change Ati voltages in the BIOS on their newer cards.
Oh, well the 6xxx series from Nvidia were still capable of BIOS voltmodding. I voltmodded my card BIOS from 1.1v to 1.5v and achieved significant overclocks (kept it cool with my NV silencer). Why did Nvidia disable this feature with the 7 series? IMO very stupid.
post #10 of 11
Quote:
Originally Posted by wudaddy
Oh, well the 6xxx series from Nvidia were still capable of BIOS voltmodding. I voltmodded my card BIOS from 1.1v to 1.5v and achieved significant overclocks (kept it cool with my NV silencer). Why did Nvidia disable this feature with the 7 series? IMO very stupid.
I guess they figure out that we can flash the bios on and 6800GT and get the same performance as 6800U without spending extra cash. So they stop all of that at G70.
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