Author Topic: xbox 7v fan mod (Read 8502 times)

DARk_ANGEL · « **on:** October 24, 2009, 09:01:11 AM »

can anyone put a pic of 7v spot so i can put my talismoon fan in.
i wanted to do it on top of the mobo.

PspKicks316 · « **Reply #1 on:** October 24, 2009, 09:44:39 AM »

You mean 12V...?

DARk_ANGEL · « **Reply #2 on:** October 24, 2009, 10:11:39 AM »

no i mean that i want to connect my fans to a 7v spot on the motherboard because i have 12v now but its to loud.

PspKicks316 · « **Reply #3 on:** October 24, 2009, 10:18:00 AM »

There's no 7v spot. There's 5v...
Make sure the fans are made to handle 5v/12v though. Some only run at 12v.

DARk_ANGEL · « **Reply #4 on:** October 24, 2009, 10:49:31 AM »

ohh ok then thankz for the help ill leave it at 12v then

taylorclark · « **Reply #5 on:** October 24, 2009, 11:01:26 AM »

Here's something to try. I did this and it works great.
http://www.heatsink-guide.com/content.php?content=control.shtml

DARk_ANGEL · « **Reply #6 on:** October 31, 2009, 10:08:32 PM »

is this like a home made temp controller or something?

blackburn · « **Reply #7 on:** October 31, 2009, 11:25:50 PM »

no, there is a 7v fan mod. 12v goes to positive and 5v goes to negative.

PspKicks316 · « **Reply #8 on:** November 01, 2009, 04:47:44 AM »

My bad. Didn't know that voltages worked like that. Is that the same for everything? +3V and -2V gives me +1V?

taylorclark · « **Reply #9 on:** November 01, 2009, 06:44:56 AM »

Quote from: DARk_ANGEL on October 31, 2009, 10:08:32 PM

is this like a home made temp controller or something?

exactly.

blackburn · « **Reply #10 on:** November 01, 2009, 11:45:34 AM »

Quote from: PspKicks316 on November 01, 2009, 04:47:44 AM

My bad. Didn't know that voltages worked like that. Is that the same for everything? +3V and -2V gives me +1V?

yep! and theres a couple spots on the xbox mobos that output like 3v or something very close, which will give you 9v i believe

PspKicks316 · « **Reply #11 on:** November 01, 2009, 11:48:17 AM »

Holy crap. That's amazing.

blackburn · « **Reply #12 on:** November 01, 2009, 11:50:25 AM »

Quote from: PspKicks316 on November 01, 2009, 11:48:17 AM

Holy crap. That's amazing.

802Chives · « **Reply #13 on:** November 03, 2009, 06:12:33 AM »

Quote from: PspKicks316 on November 01, 2009, 04:47:44 AM

+3V and -2V gives me +1V?

that would effectively be 5V on the fan not 1V

DARk_ANGEL · « **Reply #14 on:** November 03, 2009, 10:12:59 AM »

cool thanx guys it really helped

PspKicks316 · « **Reply #15 on:** November 03, 2009, 11:52:26 AM »

Quote from: 802Chives on November 03, 2009, 06:12:33 AM

that would effectively be 5V on the fan not 1V

Not according to blackburn's logic...

If positive 3V and negative 2V is positive 5V, then why is positive 12V and negative 5V equal to positive 7V?

Amerikun Soljia · « **Reply #16 on:** November 03, 2009, 12:58:09 PM »

I think he meant to say that a positive 3v and a negative 2v is a positive 1v. Negative would essentialy subtract the volts as it is a ground and why its called a "negative" so in essence, a positive 12v with a negative 5v would churn 7v's. i think, could be wrong tho.

Modify post: Does anyone have a picture layout of the mobo with all the power points highlighted? like all th + and - spots? I'm having a hard time locating them myself.

802Chives · « **Reply #17 on:** November 04, 2009, 06:54:29 AM »

Quote from: PspKicks316 on November 03, 2009, 11:52:26 AM

Not according to blackburn's logic...

If positive 3V and negative 2V is positive 5V, then why is positive 12V and negative 5V equal to positive 7V?

nope i meant what i wrote, if you dont believe me use a meter and measure yourselves.

negative voltage does not cancel out positive voltage. 12-5 = 7 3-(-2) = 5

you subtracted 5V from 12v, however when you used 3V and -2V you added them. the convention doesnt change when a negative voltage is present. Voltage is measured with respect to a referance. when measuring a voltage with a meter if you are using -12V as your referance, then ground (0V) will measure +12V... using the same -12V referance if you mesure the +12V you will read +24V. think of a number line and absolute values.

PspKicks316 · « **Reply #18 on:** November 04, 2009, 07:08:56 AM »

Oh I see where we're butting heads.
I'm saying negative xV.
By negative, I just mean that it's connected to the gnd/negative terminal. Not an actual, like, negative voltage (Is that possible? Wow I feel dumb lately..).

So what I mean by +3v and -2v is that 3v is on the + terminal and 2v is on the - terminal.

Maybe I should've worded that differently from the start, but hey now we all got a new lesson in voltages haha. Thanks Chad.

802Chives · « **Reply #19 on:** November 04, 2009, 08:09:11 AM »

hahaha I see the confusion. your negative lead is your referance, you measure voltage with respect to that(wherever that falls)

One more thing to note.... producing different voltages this way is not a recommended practice, I dont advise against it(in this case) because it has been tried and proven, however when it comes to other electrical systems doing this type of thing could cause problems depending on how it was designed.

Amerikun Soljia · « **Reply #20 on:** November 04, 2009, 11:50:30 AM »

ok, I was way off, lol. Just a guess. good lesson tho man. I learned something today! yay!

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Author Topic: xbox 7v fan mod (Read 8502 times)