Originally Posted by Phaedrus2129
Brutuz: You can't just multiply the forward current rating of the DrMOS chips by the chip's Vcc, or else increasing the voltage wouldn't cause the VRMs to blow up. The voltage going through the fets is constant, but with a higher output voltage they need a higher duty cycle (at .95V they might be on for 20ns, off for 30ns; at 1.1V they might be on for 35ns, off for 15ns. (Arbitrary numbers)). That means that they have to sustain a current for longer, which means more stress on the chips, etc.
Yeah, I get that, I was doing a simplified comparison which kinda shows that the mosfets are rated to barely satisfy the GPU as a whole, whether that's whats causing the death or not.
Didn't help it was ~5am after a night out when I wrote that.