Easiest Way To 12v The Fans!, Includes Instructions for 7 and 9 volt. Options

[HoBoz]

Thanks, It makes sense now. :

I guess I am just dense sometimes.

[HoBoz]

This is based off of Grim187's pic, I just added some text.

Note: This is for the GPU only. And it is one a V-1 board.




BTW... Thanks Grim187 for all the help and patience.

This post has been edited by HoBoz: Jan 31 2008, 06:05 PM

[chipD]

Does anyone know if this mod can be done on a zephyr?I want to 12v both fans, but i dont want to do this from the bottom side of the board, must be topside.

Thanks

[Grim187]

im pretty sure it can be done on a zephyr i just don't have one to find the points, if/when i get another one in i will check points and take pictures.

if you want me to do the 12v fan mod on it i can for $5 and i would throw in the heatsinks upgrade for free, that way i could post the points for other people.

[chipD]

Thats ok grim187 im perfectly capable of doing the mod, Im just not sure i wanted to risk going by the falcon diagram and blowing transistors,caps,or resistors if something is slightly different.Heres a pic of my zephyr's fan connector area.It looks to be the same as the falcon, but maybe you can take a look at it, and see if theres anything different.I have a multimeter so if you see any points you want me to test to make sure, let me know.




Sorry about all the clutter in the pic.I didnt want to remove the WC tubing and temp probes.

[Robotboy1]

Grim, what do you mean by heatsink upgrade?

[HoBoz]

Grim, what do you mean by heatsink upgrade?

I would assume that he means lapping the heatsinks.

[Grim187]

chipD: ya that looks the same, i believe that's just the CPU tho. you can test the right side of that transistor to see if its 12v.

RobotBoy: i lap the heatsinks to 2000, reapply them with AS5 and i also put a piece of light cardboard over the gpu heatsink and in the case of a v2 or v3 board i would bend the arm of the gpu heatsink so more air would flow thru it.

[chipD]

chipD: ya that looks the same, i believe that's just the CPU tho. you can test the right side of that transistor to see if its 12v.

So on the falcon diagram bridging the transistor on the topside only runs the cpu fan at 12v? So the transistor on the bottom is for the gpu fan or is that for the cpu fan also?

Im just trying to decide if its really worth the extra work to bridge the transistor on the bottom side.

[Grim187]

So on the falcon diagram bridging the transistor on the topside only runs the cpu fan at 12v? So the transistor on the bottom is for the gpu fan or is that for the cpu fan also?

Im just trying to decide if its really worth the extra work to bridge the transistor on the bottom side.

i have another falcon coming in soon, just give me a week or so and i will update it.

[chipD]

Grim187, are you sure bridging the topside transistor only 12 volts the cpu fan on the falcon board? I took the risk and bridged the transistor on my zephyr, and i swear both fans are running @ 12 volts.It even feels like the gpu side fan is flowing more air....weird.

[Grim187]

Grim187, are you sure bridging the topside transistor only 12 volts the cpu fan on the falcon board? I took the risk and bridged the transistor on my zephyr, and i swear both fans are running @ 12 volts.It even feels like the gpu side fan is flowing more air....weird.

no im not %100 sure but they are controlled independently so they should be on different circuits.

edit: the top side 12v's both the fans where the bottom side only 12v's the CPU fan, i will try to find a spot to just 12v the gpu fan.

This post has been edited by Grim187: Feb 7 2008, 01:05 AM

[scuba156]

well i just tried to do this on a V2 using the V3 diagram and its caused a few problems.

at first it all seemed ok, then after i put it all back together and tested it out, only GPU fan was working, and then the GPU fan died while it was running.

ive looked at all connections and it all seems ok

EDIT: i just realised that they work fine on 12V but will not run off 5V (i hooked it up to a switch which i tested first

This post has been edited by scuba156: Feb 7 2008, 07:13 AM

[chipD]

no im not %100 sure but they are controlled independently so they should be on different circuits.

edit: the top side 12v's both the fans where the bottom side only 12v's the CPU fan, i will try to find a spot to just 12v the gpu fan.

Thats what i thought, I knew i wasnt just imagining things.

Thanks man.Definitly an easy mod.

[shah87]

ok i have xenon motherboard...and im referring to the bottom of the board pic

do i have to solder both bridge to make the cpu+gpu fan run 12v or just one of them (that stated 'Both = GPU + CPU')?

This post has been edited by shah87: Feb 7 2008, 05:35 PM