Sound is frustating

It will make sound cause ur fans are working.

In standby ...The comp. isn't totally off ....So to maintain the Temperature, fans work.
So no reason to worry.

sometimes the system do get turned off in stand by mode (fans stop working as well)...it depends on the type of the motherboard i think

my previous pentium based system's cpu fan used to make a lot of sound too sometimes...while booting up mostly...just like the heavy pick up of a sports car lolz...but the system had no flaws...one of my friend's system has the same noise still

i don't think it's much to worry about...

nuthing to worry abt, its just the fans.

Hm.......... check whether any wires are not touching fan ..if not then its alright

Yes it should be fine..
but just do check that if you have installed a cabinet fan, it is running at good speed. In my case my cabinet fan was making more noise because it was not spinning at good and steady speed. Note that here I am just refering to the cabinet fan.
I guess these days you do get systems wherein the CPU fan speed gets adjusted as per CPU temp.

The fan noise might increase with the amount of dust in it. Use a vacuum cleaner's blower to blow off the dust. So the fan can push same amount of air with less stress and speed, so noise ll be reduced dramatically.

Also it ll make real noise if the fan bearing is not aligned. If its a cabby fan, then get another one for 50 bucks. In case of proccy fans then see if ur mobo supports any CPU fan control utility like Q-fan[Asus mobos]. It ll regulate fan speed in accordance with CPU temps and concentrate on keeping the noise low.

Guys he's sayin sound comes even when system hibernates. That aint possible!

maybe its some insect thats makin the noise

or the speakers might be hizzing.

^^ lolz. You are funnier than NewsBytes.