dead fan

i have an asus g20 AJ, with a gtx970 (founders?), and that's all fine, my gpu's fan is starting to give up, so i was looking for a replacement, but i quickly fount out that the 970 usually doesn't use this type of cooler, which is identical to the 960's founders one, so i wanted to ask if...

Ok so I am truly stumped here. My system is about 6 years old, and I have never had a single issue with fan performance until now. I am running a Asus Maximus VII Hero with i7-4790k. I noticed the other day that both of my fans on my h100i were not working and my pc was getting way too hot...