My Chassis fans are not detected in BIOS?

kangdemon

Honorable
Nov 6, 2012
9
0
10,510
So i build my pc a few days ago and just now i decided to take a look in the BIOS just to see my startup cpu temp. I noticed in the "Monitoring" tab, there is chassis fan 1, chassis fan2, chassis fan3, chassis fan 4(there is also cpu fan but thats irrelevant), but it only shows the rpm for the third chassis fan which is 850, all the other ones are N/A. My case has a total of 3 built in fans. Does this mean that the other 2 case fans in my corsair 400r are not working? I feel a small breeze coming from the front of the case which is where the 2 fans are but the BIOS cant detect them....