I bought a GTX 1070 a while back, but never put it to use because it had a broken fan. One of the two fans did not spin, and it was the fan that has the tachometer signal cable coming out of it.
Obviously, this meant that the GPU would not register fan-speed, so the fan-controller would ramp up the speed of the other fan to 100% even though the GPU was almost room-temperature (40C/100F) and no load.
I have since replaced the fans, and I know for a fact they are working correctly because I’ve tested them separate from the GPU, even the tachometer signal is working fine.
The GPU still does not register fan-speed, so I fear that the fan-controller is broken.
It’s for sure not a software problem. I’ve tested and re-tested a bunch of drivers, even on a fresh install of Windows. I’ve updated the firmware on the card to the latest version. That all does not seem to work. I’ve used all kinds of monitoring software, and they all report “0 rpm” when I hear the fans (both, since they’re repaired/replaced!) spinning at 100%.
Does anyone have any idea how to fix this? Can it be fixed?
I know the hack of using an adapter cable and plugging the fans into a motherboard CPU connector. That’s not what I’m looking for.
I actually intend to sell the card since I have no direct use for it myself, but so far nobody seems interested (locally at least). So if I could fix this, I would have a much better chance I believe.
The warranty on this card has expired, I’m afraid, so it’s either repair it myself, or sell it very cheaply if at all.