A question about fan speed

T

Trio

New Member
I'm planning on replacing all the fans in my case, but before I do I have a couple of questions.

Are fans connected directly into the PSU running at maximum speed? If not, would a fan controller increase fan speeds? And also, how can I measure CFM? Thanks in advance for answering.
 
Most CPU fans are connected to the motherboard, and often boards have
inputs for a couple Aux fans also, but not all. Those fan speeds will be
controlled by the board. (varies by board)

Plugging them directly into your PSU does indeed run them at 100%,
and a fan controller put in between the PSU and the fan will give you
negative control over that. Meaning, the controller will allow you to
slow them down, but not increase the speed past the fan max, obviously.

I would say the only way to measure CFM is to check the specs that come
with the fans, or check the manufacturers website.

I think they make some hand held airspeed meters, but I don't know if they
would work for something like this.
 
Oh, alright. My CPU heatsink fan is connected into the mobo, and the manual says the fan speed with vary depending on what it's doing. So to increase the speed I'll have to download some sort of fan control software? Which would be best, using a fan control software or a switch that came along with the fan to increase and decrease the fan?

Personally, I think using the software is simpler and I wont' have to worry about the switch getting lost, but the kind of answer I'm looking for is whether the fan will run 100% if I were to use either the switch or a software.
 
You can use SpeedFan to adjust your fan speeds as you see fit if your fan is electronically controllable (most HSF units are by voltage).

Both software and switch can set your fan to 100%.
 
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