I just upgraded my graphics card. When I plugged back in everything (power, monitor, peripherals) one of the case fans started spinning. The fan on the CPU cooler moved every ~1 second a little bit and its LEDs turned on. That's before I even turned on the PC. Then I turned off the power supply and unplugged it, yet the fan still continued to spin and the LEDs are on. When I unplugged the DVI cable from the new graphics card, everything turned off. What is happening here? I'm starting to panic. When taking out the old card, I had to apply some force, but nothing that I would think would cause any damage. Any advice how I should proceed?
Fan spins with power unplugged?!
- Thread starter Pefus
- Start date
Assuming none of this happened with your od GPU which was plugged into the same PCI slot and the same PSU cables, there must be some wires crossed on the new GPU. I would try to confirm this by plugging the new GPU into another machine. BTW, it's not unusual for PSU capacitors to retain some power however if the fans spin indefinitely I think you also have a PSU problem.
IAMEXTREME
Honorable
- Sep 6, 2013
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That just looks like a Paranormal Activity 
Calm down mate No need to worry about such little things 
Calm down mate
No need to worry about such little things This definitely didn't happen with my old GPU. I installed the new one in an other PCI slot, to have some distance to the CPU cooler, but I just tried the same old PCI slot with the same result.
Here is a video of this paranormal phenomenon: http://www.youtube.com/watch?v=tVqjuyXniKM
The fan keeps spinning until I unplug the DVI cable. In the monitor this DVI cable is plugged in, there is also a second DVI cable connected to my MacBook. The MacBook is using a powered Mini DisplayPort to DVI adapter (http://store.apple.com/us/product/MB571Z/A/mini-displayport-to-dual-link-dvi-adapter). This seems to be the cause of the problem, since the fans in my PC will spin, even if I unplug the monitor too. So effectively, the fans in my PC are powered by my MacBook via 2 DVI cables and a monitor?!
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