GPU fans spinning when my pc is turned off?

[matthew_01]

So recently I got a myself a new graphics card (second hand 980) and the cards fans never stop spinning. Even when my pc has been shut down the fins twitch. Just wondering if there's a way to stop this or if there is a reason behind it.

 

[toshibitsu]

What's funny is I had a Zotac 970 that did the same thing. I later switched to a VisionTek RX 470(put the 970 into an external enclosure to use on a Macbook) & the RX 470 did not do that.