without a microphone you cant check the actual noise of your PC, but theres plenty of programs available to monitor the speed of your fans that are plugged into the motherboard. i'm pretty sure HWmonitor is the OcUK favourite for this, but im not sure if it does the graphics card.
for the graphics card fan go with MSI afterburner because it can do so much as well as monitor fan speeds. it is can take screenshots in multiple formats, record video + audio for as long as you like, monitor framerates and of course monitor your graphics card fan speed and temperature. its also arguably the best graphics card overclocking software out there
It's possible that you'll only be able to change the speed of the CPU fan. Any other fan attached may just have rpm sensing but no control.
If so there are several ways to lower noise.
1) Use a fan controller.
2) Fit a resistor/Zener diode to the noisy fan to slow it down.
3) Do the 7v or 5v trick.
4) Replace fan with a slower turning fan.
I reckon only buy a fan controller once you have confirmed that you can't control the speeds with bios settings or software. Speaking for myself I always prefer to know that my fans will speed up automatically when the temps increase. I bet I would always forget to twist the dial to increase speed.![]()