Two things....driver 8.6.1 and higher have reduced the fan speed as it was excessive. This should reduce noise significantly. UNLESS!~!!
Unless the fan is being obstructed by the foam grommet that prevents vibration from the chassis. Or if the fan is failing.
In the first case the fan will be slowed down and the device will quiet. In the second two cases, the fan is being obstructed doing two things, making noise and causing the device to overheat. So if you notice the device is hot...and I mean hotter than hellfire and damnation, then that fan may be obstructed and you should contact us so we can replace it for you.
hrm...I wouldn't think you should hear electrical noise...I'm wondering if we still shouldn't just replace it to make sure there's no issue with that fan. May you can send us an audio clip we can listen to to better determine.