roofey :
So I bought and installed new motherboard today, it all works just fine but some fan is making awful lot of noise, not all the time but randomly when surfing the web it suddenly becomes noisy for a while and then goes back to normal, i suspect its the cpu fan but im not sure, I also recently bought a better PSU aswell, could that be problem ?
Hi Roofey,
Did the PC make this noise before you fitted the PSU. If not, it means its the PSU making the noise.
I suspect its not the PSU, as the PSU fan speed doesn't vary much under short load bursts. You may not notice this, but as you surf the web your CPU is used a lot to render the web pages. Heavy pages will cause the CPU to be used alot to render the page, which increases the load on the CPU making it hotter. Of course when its hotter, the fan kicks in to cool things down. This is most likely the reason why you're experiencing this noise.
This type of feature is common on newly installed motherboards as the settings on each motherboard to control the fan speeds are different. So the user would notice a change in fan noise/speed after installing a new motherboard. A way to fix this would be to set your desired fan settings in the BIOS.
If you're concerned, I would download Coretemp or Speedfan to measure the CPU temperature. If the noise occurs when the CPU is hot or on load, then you've found your problem. Either set the idle fan speeds to higher so you don't notice such a subtle change or perhaps change the settings for the fan speeds per temperature change in the BIOS. If it turns out not to be the CPU, then it would probably be your GPU fan or PSU fan, as modern browsers now take advantage of GPU acceleration and you noted that the PSU was newly installed. You could try disabling the GPU acceleration in this case to eliminate this variable, but its highly unlikely that its the GPU in my opinion.
Hope this helps you with your problem,
Anthony.