What You Should NOT Do to Your 5900XT
Vcore is originally 1.4v on 5900XT-based graphics cards. The chip itself could have worked at a twice-higher voltage given enough cooling, at least for some time. Anyway, it is not easy to kill the graphics core with a too-high voltage (without overheat) – you should be either hopelessly unlucky or a downright botcher, but the electric current goes through the power-supply circuitry before getting to the chip and the elements of this circuit don’t all have a big reserve…
So, never increase Vcore of 5900XT-based graphics cards above 2.0v!
There’s a silly thing on the PCB marked as IOR 334H. Raising the voltage above 2 volts you nearly always burn this element out. Even considering the low popularity of volt-modding of the 5900XT (mostly because of the lack of good guides – I hope this article helps to improve the situation), I know of three absolutely identical cases of this chip’s burning out.
Well, my case was the fourth… All was good at 1.95v and I decided to increase Vcore just a little, by 0.1v, to reach 2.06v. The card started passing a test, but the weak link in the power-supply scheme broke and victoriously committed suicide through self-immolation.
The card went to the repairmen and its further fate depends on the availability of the necessary chip, while I switch to more interesting objects for benchmarking: RADEON X800 Pro and GeForce 6800 Ultra.
Later on, I thought the situation over and came to a conclusion that another simple modification might have helped me avoid the troubles. The burned-out chip and other power-supply elements do heat up a lot at work, especially after volt-modding. Gluing heatsinks on them, I’d most probably have solved the problem…
As you see, skill and the right approach may make the GeForce FX 5900XT perform wonders, show outstanding results and bring joy to its owner. None of the above-described modifications is very sophisticated, so you shouldn’t stop yourself from tapping the potential of your graphics card. Good luck!