its ok. this is the sound of power, just like muscle car. more noise, more horse power. LOL!

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I guess I'm not getting this. Don't fan speed controllers have to be plugged in? I mean I have no idea how I would wire it in physically and I don't want to ruin my fan mate in doing so. Cant I just lop the fan off safely?

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I've never seens a 'permanently attached case fan'. Is this one of the PSU cooling fans that's attached externally on the PSU and also acts to cool the cpu? Or is the fan attached to the chassis? In either case, unless it's in an enclosure that's welded shut you should be able to remove it. Have you tried using a screwdriver? The noise may mean the bearings are going. Just replace it. You should be able to use the same power leads. Just cut the wires to the old one and and connect them to the new one.

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It is attached to the PSU and can be used as a case fan. The case and the PSU came together, but I built the rest of it from individually ordered parts. What do you mean I should be able to remove it? It is wired directly into the PSU! Do you propose crackng the PSU open and cutting the wires there or something?

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You may need to open it or not how about this, give us the Make and Model number of this PSU that you are dealing with and I bet in no time one of us is going to google the info you post and be a lot more helpful with suggestions,work arounds and maybe a couple of links for you to choose from ? Keep the old stuff running

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If it's the type I'm thinking of, the fan is attached to the PSU with 4 rubber studs. It is difficult to remove as you're likely to pull the rubber studs out. The fan acts as the PSU cooler and is designed to also blow air over a CPU heatsink. The airflow is opposite the usual setup in that air is drawn into the case through the PSU instead of being pushed out. I try to avoid those power supplies because the fan often gets in the way of the motherboard hardware. And if I have one with a bad fan I just throw the PSU out. They're usually older 200 - 250 watt models anyway. Replacing the fan in that thing is posssible but difficult and I think in the long run you'd be better off with a different power supply.

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It is a standard power supply. The air blows out of the case. Nothing is abnormal about it. It is from JustPC(USA)Inc Model JPC-450-12v (450W MAX) http://img183.imageshack.us/img183/... The red cable near the top is the one that runs to the fan. In the right corner is the PSU. The cable that the fan is attached to leads to the drives and also the PSU.

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Oh and I was wrong when I said that it was directly wired in. I meant that it was connected to the power supply in a manner that it wasnt just a simple 3 prong thing.

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Is the fan that shows in the picture the one you're talking about? It looks to be a 3-conductor one and I can't see how it's connected. The power supply connection in the foreground has 2 wires--the red and black--that could be going to another fan that's not shown. If you don't want to use the fan they're connected to just cut the wires. Then you could attach another fan's wires there or you could not use them at all. If you don't use them you should probably cut the wires as close as you can to the molex connection from the power supply. That will keep the loose bare wire ends from shorting out. You have several options in replacing the fan. You can cut the wires and attach the new fan, as mentioned above. Or you can find a fan with a regular 4-pin molex connector that will plug directly into one of the 4-pin connectors from the power supply. Or you can get a fan with the small 2 or 3 wire connector that attach to one of the motherboard fan connectors.

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No, the fan in the picture is a secondary case fan. The red wire leading to the left is the fan attached to the PSU. So I can cut the wires and then cut the wires on another fan, and just attach them directly by hand? Do I have to worry about discharging any charge in the PSU before cutting the wires (of course assuming that it is off)?

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Just make sure the power supply isn't plugged in. Yeah, you can cut the wires, strip off about 1/2" of insulation on the new fan wires and on the 2 wires you cut from the power supply. So each end should show about 1/2" of the bare copper wire. Then twist together the red wire you cut from the power supply to the red wire of the new fan. Connect the black wires together in the same manner. (Just so we don't get the wire colors confused, I believe the small red wire you cut coming from the 4-pin molex connector is connected to a yellow wire coming from the power supply. That's the way it's supposed to be. The yellow wire from the power supply is 12 volts and the red wire from the power supply is 5 volts. Anyway, just pay attention to the small red and black wires you cut and not the other ones coming from the power supply.) I usually use a soldering iron to melt some solder on the connection so it doesn't pull loose. If you don't have one you may be able to just twist them together. Then wrap the connections with electrical tape. You don't want the bare twisted connections to come in contact with anything else. Heat shrink tape may be best. Places like radio shack should carry it. It should be a fairly simple procedure and I hope I haven't made it sound too difficult. But if you're not comfortable doing it you should probably have a friend help.

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