Very loud noise on startup after

[litwicki23]

Basically when I boot up I can hear a strange noise. Sounds like a fan losing power or slowing down. When I get into Win 7 Its quiet and normal. The noise is gone.

This only seems to happen if the pc is left off for quite long and I boot it up in the mornings etc.

Any idea what this could be?

pc:

Sabertooth Z77
I7 3770K 3.5
8gb ram
Msi Gtx 680 Twin Frozr
Be Quiet Dark Power Pro 1000W

 

[jay_nar2012]

When a fan goes slower it usually gets quieter as less air is being moved and the fan's motor is spinning less fast.

You sure your temps are fine, i think it can be normal for some systems.

 

[phyco126]

Typically fans and what not spin up really fast when the PC is first turned on, and then will quiet down as the PC boots up.