need help with fan speed

[junked]

i had a cheap fan in my case that went out recently so i bought two new 3 pin fans one to replace the faulty one and one to replace the one beside it. after trying to change the settings in the bios i can't seem get them to go above 500 rpms.

under hardware monitor i have the ability to change the fan 1 and 2 between 50% and 100% but it doesn't effect the rpms at all.
i have another one of these fans hooked up as a cpu fan and its at about 1500 rpms when i'm looking inside the bios.

i was reading a moment ago that because its not 4 pin you can't change the fan speed that way. i'm trying to figure out if there is anyway to change the fan speed through some other means.

 

[bobs616]

If you put a 3 pin fan on a 4 pin connector and you can't control it means your MB can only PWM so your choice would be to get a couple of 4 pin fans or a fan controller that regulates voltage to 3 pin fans.

Edit: or you could power them from 3 pin posts on the MB if it has any, even if it doesn't allow speed control they should run at full speed.

 

[mrt3]

you have a cheap fan and whether you use it with 4pin r 3pin the rmp will not increase. cpu fans have upto 4000rpm. got it?

 

[junked]

If you put a 3 pin fan on a 4 pin connector and you can't control it means your MB can only PWM so your choice would be to get a couple of 4 pin fans or a fan controller that regulates voltage to 3 pin fans.

Edit: or you could power them from 3 pin posts on the MB if it has any, even if it doesn't allow speed control they should run at full speed.

i don't have any 3 pin connectors and i might try looking for a fan controller that can regulate voltage instead of buying different fans.

either way thanks for the response, this is what i needed to know