How to change fan speed in BIOS?

[Cpuwarrior]

I went to H/W monitor and it does not show fan 1, fan 2, fan 3 etc. it only shows 3/4 pin option, min fan speed option and desired fan speed.

 

[Computerrock1]

17 - 35 dBA is the tx3's noise level. I would definetly opt for the XIGMATEK I showed you, much less noise. As for it fitting, it all depends on how big your case is.