Sup, I've had my computer for a few years now, I've done upgrades and shit but the thing is, it's always been a really loud motherfucker. I mean, I've never personally heard a computer even close to being as loud as mine. If I keep my room door open I can hear it in the fucking hallway. The thing is loud as fuck.

Yes, I clean my computer. What should I do to quiet the shit down? This has been making me sick for YEARS ok.

This is it.

One hard drive.

2 video cards, one sound card in between, and a firewire on the bottom.

CD drive and computer bay thingy.

One 8mm fan on the side.

Ok well, I think it's my cpu fan but can that really be THAT loud? I've had a different one before and it was still loud.

Fans are usually what will make loud, irritating sounds. Otherwise there's something seriously wrong with one of your other components, cause I'm not sure what else can be making that much noise and still be working properly.

See if you can borrow a friend's fan to test it out.

I can't tell if the back fan is making the noise but is seems pretty quiet. I haven't been able to discern a lot of noise from the video cards but I believe there is some. The psu is near silent. HD is quiet, cd drive is quiet.

Well I guess it could be the cpu fan.

I don't have friends with tech shit.

Well, there are 4 possibilities:

1. Rear fan
2. Processor heatsink
3. Side fan
4. Graphics cards

Now then the side fan and the rear fan look to be of pretty low quality, so I would suggest replacing them with fans that produce under 20 dBA. The stock AMD fan should not be making a lot of noise, but unplug all the other fans and see. Also turn on AMD Cool and Quiet, since it is usually on all ASUS motherboards, that should regulate fan speed. Otherwise there are millions of quiet heatsinks out there. For the graphics cards, you can replace the stock heatsinks with passive coolers or quieter fans.

Here are some recommendations:

1. http://www.newegg.com/Product/Product.aspx?Item=N82E16835185057 - Scythe is well known for both their high-airflow/high-noise fans and their quiet fans.
2. http://www.newegg.com/Product/Product.aspx?Item=N82E16835106088 - I recommend Thermaltake.
3. http://www.newegg.com/Product/Product.aspx?Item=N82E16835224011 - I have five of these in various computers I have built, they are excellent and very very quiet.
4. http://www.newegg.com/Product/Product.aspx?Item=N82E16835106112 - Again, I recommend Thermaltake. The only better VGA cooler than this is the Arctic Cooling Accelero S1 and it is BIG, full tower only.

Without the graphics card coolers the total would be about 50$, with the GPU coolers: 100$.

strick your finger in each of the fans while the computer is running to see what one makes the most noise. They are on ball bearings so you won't hurt yourself or the fans.

Obviously don't just wedge your fings into the blades, go in slowly to slow down it down first. If the fan doesn't start spinning when you pull your finger out, give a little spin so the magnets catch it again.

Once you start going above 100$, you might as well get a liquid cooling system. Very quiet, easily adjusted for upgrades, and will give you great potential for overclocking.

Psyburn, you're lucky it's not your HDD making the noise (as that would indicate hard drive failure!). Leafo has some pretty good advice; you can slow down the fans to a stop with a finger or pencil or something... just don't do it for very long, especially in the case of the CPU fan where it could overheat quickly. One thing you can often do is slow down the speed at which the video card fans run when not in a graphic intensive game. I think this can be done with software like RivaTuner.

Ok, well I found out the back fan is what is causing all the noise. The CPU + video card together still has a little bit of noise but it's nothing big. I'll probably get one new video card and take out the two there already.

A few things:
1. Is the scythe case fan the right size for my computer?
2. I have no idea how to remove/install a CPU cooler. Do I have to remove my whole motherboard to take off the stock AMD fan?
3. Do I have to get thermal paste with the CPU cooler?

Thx.

Just take a ruler and measure the fan.

Motherboard does not have to be removed, there is a plastic clip on one of the sides of the cpu that lets the heatsink and fan go.

You are going to want to replace the old thermal paste because it doesn't work as well when you break the bond by removing the heatsink. Any heatsink/fan combo for cpu will come with some thermal paste, but it is generally cheap stuff. You can buy nice thermal paste if you want. The diference in degrees it makes is mostly negligable, but some people swear by the expensive stuff. (and by expensive I mean like 5 bucks for a tube of it, so you might as well get it)
Arctic Silver was the brand that was popular last time I bought thermal paste, it probably still is.

Well horizontally the box thing is slightly less than 4 1/2 inches. :/

Measure it in millimeters. 4.5 inches is 114mm so I'd guess you have a 120mm fan? Double check just to make sure though.

Ok, I bought a new video card and the case fan Jeff recommended. It's wayy way way way less loud but the noise is still kinda annoying. How do I slow down the fan speed and how much should I.

I may buy the heatsink Jeff recommended but the 80mm fan he suggested id not being sold anymore on newegg, anything else?

EDIT:
Ok I figured out how to slow down fans, but how much should I bring it down?

EDIT 2:
Well the PSU is making quite a bit of noise but i can't do ntothing about that.

EDIT 3:
Well I'm using speedfan and really the temperature of everything seems to be going crazy. Most of the stuff stays up but some keeps going up and down over and over. When I play a game everything goes on FIRE and shit so..........

Your computer sounds like mine Psyburn, loud as hell. I always just assumed that it was because it has four fans in it.

Mine is only loud when it's starting up usually, though.

The unfortunate side effect of not having your fans at max speed is that they are not at optimum cooling, the parts will obviously be hotter than if the fans were turned up higher. And if you enabled "Cool-n-Quiet" in the bios, that would lower your core frequencies under light cpu load, giving you a much lower idle temp than previously.