Depends on what you have and what you want TBH, the spec for those is Air Flow: 20.37CFM and Noise: 19dBA,, obviously the higher the two values the higher the air flow and noise will be, do you have any idea about your current fans ?
But TBH I don't think there will be a massive difference from what you currently have with these figures, unless they are totally useless, what do you intend to use them for ?
But TBH I don't think there will be a massive difference from what you currently have with these figures, unless they are totally useless, what do you intend to use them for ?