My computer recently began making a pulsating buzzing noise. It will be sitting quietly, when all off a sudden there's a buzzBuzzBUZZBuzzbuzz sound, repeating again and again. It's actually pretty quiet - but it's definitely noticeable. I'm worried that something might be borked!
I recently installed a new GFX card, could that have something to do with it?
It's a desktop PC tower, without integrated speakers (no cell interference).
The sound will stop and start randomly - I'll have the noise going on for a good 20m, I'll leave my computer, come back, and it's gone. It does not seem to be associated with any computing processes (ie, high CPU consumption, demanding graphics...).