Wire unplugged inside computer?

I was looking at my computer and I noticed the case fan was going slow. Thinking it was maybe just a little bit dusty I looked inside(didn't open the case) and noticed there was very little dust. While looking inside i noticed there was wire that was unplugged and it said "SATA". Is this unplugged... show more I was looking at my computer and I noticed the case fan was going slow. Thinking it was maybe just a little bit dusty I looked inside(didn't open the case) and noticed there was very little dust. While looking inside i noticed there was wire that was unplugged and it said "SATA". Is this unplugged cable causing my case fan to go slow?
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