I bought a PWM fan to use on my 1080ti. Currently I have it partly running off a motherboard PWM header. Partly, because only the control line and sensor line go to the motherboard header while the 12V line and ground line go to a 4-pin molex connector.
What I'd like to to is connect the control line and sensor of the fan to the 1080Ti so I can tie control of the RPM of the fan to the GPU temp instead of the CPU temp (which hasn't been working out well).
Does the control line of a PWM fan sink much current? I'm guessing the current sinked by the PWM control line of the fan increases with RPM, but would it be the same regardless of what fan is connected?
I'm not worried about ground loops because both the 1080Ti and the molex connector would have common power grounds, although I'm not sure about PWM signal grounds. Would this be something to worry about?
What I'd like to to is connect the control line and sensor of the fan to the 1080Ti so I can tie control of the RPM of the fan to the GPU temp instead of the CPU temp (which hasn't been working out well).
Does the control line of a PWM fan sink much current? I'm guessing the current sinked by the PWM control line of the fan increases with RPM, but would it be the same regardless of what fan is connected?
I'm not worried about ground loops because both the 1080Ti and the molex connector would have common power grounds, although I'm not sure about PWM signal grounds. Would this be something to worry about?