Hi, I have a custom computer I built and I'm having real problems with how loud it had gotten. Recently my friend gave me his old processor (P4 3.0 GHz with HT) and its running on my new mother board (ASUS P5NSLI) and it has been running so loud that it keeps me up, I have to open my window to let in 10 degree air to slow the fan down. There was one fan already in the case that was sucking air out on the panel side and i recently purchased another one to put in the back near the cpu to blow air in and it made about Zero difference and its putting a good amount of air in. My heat sink is just a intel that came with the CPU. The fan speeds run as follows: at 3000rpm when the CPU is 55 C. This is relatively quiet but still can easily tell that the computer is running but this is with the window open haha once i close the window the temp is still at 55C but it will run at 3200rmp-3400rmp which is enough to wake me up. note: these temps are mostly unaffected by cpu usage, when i run transcode for my 360 (converts an avi file into wmv as fast possible to play through media center) If the window is open no sound and the cpu is under rather a heavy load, but in the same respect if the window is closed and I'm not even using my computer its like a highway in my room. The Computer itself isn't in a confined area either it is out in the open in a place where air circulates easily. So my though that was maybe i need to mess with the settings in BIOS since i have never really touched them in new computer Any suggestions on what to do whether it is through the BIOS or just how I placed the fans in the case. thankyou!