[PaRaDoX]

Okay this is a odd layout and cannot be Voltmodded with a regular 7600GT voltmod
if you are trying to voltmod a regular 7600GT please see Born2killu's guide here

Okay, tools needed

*multimeter
*Pencil
*Isopropyl alcohol 85% or better

First things first. Clean the back of the card off so our pencil leaves a good mark.

Then take a multimeter and measure these two points and there corresponding resistance

Click for bigger image.
STOCK
1.375v GPU
1.8v Mem

here is what i did to my card
1.455v on the GPU by lowering the resistance to 380ohms
dropping the memory resistance from 590ohm to 515ohms gave me 2.05v mem

THIS WILL RAISE YOUR TEMPS UP 15-20C WITH A GOOD AFTERMARKET COOLER. IF YOU ATTEMPT THIS WITH A STOCK COOLER IT WILL RAISE YOUR TEMP UP ABOVE 80C

overclock.net and PaRaDoX are NOT responsible for what you do to your card

 

[TheSubtleKnife]

woot for PaRaDoX!

 

[rottenotto]

That's killer, Dox! Any idea if this will be the case with the evga Ok version, or will the standard volt mod be better?

 

[PaRaDoX]

Well i bet it's not the same as this card so try the regular one first and see if the bits and bobs line up

 

[PaRaDoX]

whewt it got stuck! added a better image, too

 

[RuSo]

uh oh.......im afraid i am gonna wreck another 7600gt (xxx this time) with this, my old one died at 760/1600..........lol

 

[PaRaDoX]

Lifetime warrentys rock dude.

 

[RuSo]

do you have the samsung modules on the card?....if so,here is some extra info on them, look to the numbers printed on the memory of your card

http://www.samsung.com/Products/Semi...24qc_rev15.pdf

 

[PaRaDoX]

I used AS ceramic to hold the RAM sinks on but i'll look around for them

 

[Lyoko]

If I paired a VF900 with my TEC like I did with my CPU and Freezer 64, temps should be in the mid 20's and load in the low 50's. The problem is, I can't get a vf900 since its too expensive and my TEC in between makes it harder to get the screws on.

 

[TheSubtleKnife]

when you use the pencil...do you shade over the resistor, or around it on the PCB? also, how many times did you go over? and do i want the graphite dust on there?

 

[CL3P20]

Quote:

when you use the pencil...do you shade over the resistor, or around it on the PCB? also, how many times did you go over? and do i want the graphite dust on there?

\\

I use a combination of both...blow the dust away gently...measure the resistor for effective change...tape over it when done. Fire it up to verify the voltage adjusment.

*15ohms should = ~.5v of change

 

[TheSubtleKnife]

ool, i got more volts to my Core, and i am at 730Mhz...but my problem is that no matter how much i shade the resistir for the memory, i cant get past 775Mhz...i went up to 2.2v, and it still wont budge...any reason why?

 

[CL3P20]

Quote:

ool, i got more volts to my Core, and i am at 730Mhz...but my problem is that no matter how much i shade the resistir for the memory, i cant get past 775Mhz...i went up to 2.2v, and it still wont budge...any reason why?

Yes..its the RAM IC's used for your rev.# card. Look at the model number on the RAM IC's and look them up. My 7600gs has RAM rated for 700mhz, so vmod'ing the mem only got me to ~750mhz...thats already 50mhz past the dealer spec for max freq.

Flashing the BIOS with a new timing set can help to gain extra mhz..but is tedious and requires some extra effort.

*Also be careful exceeding 2.2v , that is typically the rated maximum for current through the IC control chip. Smoking that results in arties 24/7 no matter what the clock speed on the mem.

 

[TheSubtleKnife]

Quote:

Yes..its the RAM IC's used for your rev.# card. Look at the model number on the RAM IC's and look them up. My 7600gs has RAM rated for 700mhz, so vmod'ing the mem only got me to ~750mhz...thats already 50mhz past the dealer spec for max freq.

whats interesting is that i did some looking around, and i have the K4J52324QC-BJ11 chips... that are meant to run 900Mhz at 2v...and i cant even get 800Mhz at 2v...whats up with that? and yes, the timings are the same as the ones in the smasung PDF

 

[CL3P20]

You verified your timings through NiBitor..er something?
---------

You might need to cool the IC controller. I will see if I can find a pic...its the small 8-12 leg IC near the vmem pencil mod area.

 

[PaRaDoX]

Quote:

Originally Posted by TheSubtleKnife ool, i got more volts to my Core, and i am at 730Mhz...but my problem is that no matter how much i shade the resistir for the memory, i cant get past 775Mhz...i went up to 2.2v, and it still wont budge...any reason why?

You need to remeber these cards also draw their power through the board, so if you trying to give it voltage that's not there, it wont work

Change the timings around also, that could hamper the overclock. Look up some on google for your chips.
And cool that IC!

 

[CL3P20]

Quote:

You need to remeber these cards also draw their power through the board, so if you trying to give it voltage that's not there, it wont work

True, but I am not the only one to get 1.7vgpu/and 2.2vmem out of a 7600..so obviously there is plenty more room to go with voltage supply.

Quote:

i cant get past 775Mhz...i went up to 2.2v, and it still wont budge...any reason why?

Your timing set is probably just a tight one. Voltage will only help, until timings need to be loosened for more speed.

 

[PaRaDoX]

true but you both have different PSU's and motherboard designs. My DFI NF4 would only let me get to 1.6v/2v maxed out but my sapphire let me hit 1.8v/2.4v... and now I have a 8600 :V

 

[CL3P20]

True, rep+