Voltage Modding the Abit FX5600 Ultra DT
Pencil V-mod your FX5600.
This will guide you through voltage modding the Abit Siluro FX5600 Ultra DT.
All you need for this job is a pencil (2B prefered), an eraser, a multimeter
and some guts.
First you should measure your stock core voltage. Measure it from this small
contact spot with the red tip of your multimeter. Be careful not to short out
any of the contact spots around it.
Red tip to spot and black tip to grounded spot like your video card handle.
You should get a reading of around 1.2v when running 2D applications and 1.4v
when running 3D.
Next, focus on the area marked in red circle. Turn off the PC and remove card.
Look for the resistor circled in red.
Measure the resistance across this resistor, each tip of the meter on each
end of resistor. It should read around 760 ohms. Mark down the default resistance.
Start to pencil it in this manner.
After each smooth stroke, measure the resistance across the resistor. Add 1
stroke on top of another to lower the resistance more and more. I would go in
30 ohms steps. Dropping the resistance from 760 ohms to 600 ohms, my core voltage
increases from 1.4v to 1.85v in 3D. So, roughly, a 30 ohms drop will increase
voltage by 1v. Thus, I would reduce resistance by 30ohms, then run the card
to see the increase in voltage, repeatedly until I reach the voltage I’m satisfied
with. Do remember to check the resistance before running the card to ensure
you don’t drop the resistance too much. When done, paste a tape over the mod
spot so that the graphite doesn’t get blown off.
I have run 1.9v 3D with good aircooling and no problems faced. I could increase
the memory voltage with a similar pencil mod as well, but it doesn’t help at
all and after a point it worsens.
For voltage mod guide, you can refer to