Posted: 10/16/2015 10:28:01 AM EDT
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I want to reduce the speed of a 120mm case fan on my PC. Molex connections Black- ground Red- 7v Yellow- 12v ON a strait up molex connection from the power supply, I assume adding the resistor to the yellow wire will slow down the fan. Is this correct? |
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Just hook your fans to one of these.
http://www.directron.com/fpx001.html?gsear=1 |
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Here are some mods with nothing to buy:
http://www.techpowerup.com/articles/other/137 note your fan may or may not start spinning at a lower voltage |
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Yes I'm looking at fan controllers too. I have a Cooler Master HAF 912 with 8 120mm fans in that bad boy. Want to tame down the loudness a bit. |
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Quoted: Here are some mods with nothing to buy: http://www.techpowerup.com/articles/other/137 note your fan may or may not start spinning at a lower voltage Great link, I have a multi meter so Ill try this out |
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Quoted:
Yes I'm looking at fan controllers too. I have a Cooler Master HAF 912 with 8 120mm fans in that bad boy. Want to tame down the loudness a bit. Quoted:
Yes I'm looking at fan controllers too. I have a Cooler Master HAF 912 with 8 120mm fans in that bad boy. Want to tame down the loudness a bit. A controller that does PWM is the "best" solution, especially if you have multiple fans to control. Switching them to 7v is cheaper but they might not spin at all, and you won't have any control over them. Easy enough to test it first before making any changes, just connect the red and yellow to the + and - on a fan. I just noticed you said in the OP the red is 7v but it's actually 5. You can make 7 by connecting between the 12 and 5. |
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Quoted: A controller that does PWM is the "best" solution, especially if you have multiple fans to control. Switching them to 7v is cheaper but they might not spin at all, and you won't have any control over them. Easy enough to test it first before making any changes, just connect the red and yellow to the + and - on a fan. I just noticed you said in the OP the red is 7v but it's actually 5. You can make 7 by connecting between the 12 and 5. Quoted: Quoted: Yes I'm looking at fan controllers too. I have a Cooler Master HAF 912 with 8 120mm fans in that bad boy. Want to tame down the loudness a bit. A controller that does PWM is the "best" solution, especially if you have multiple fans to control. Switching them to 7v is cheaper but they might not spin at all, and you won't have any control over them. Easy enough to test it first before making any changes, just connect the red and yellow to the + and - on a fan. I just noticed you said in the OP the red is 7v but it's actually 5. You can make 7 by connecting between the 12 and 5. Yes i knew red was 5 just had a brain fart for a min. Yes Ill try them out and see if they will even start spinning at 5v first |