Overclock.net › Forums › Cooling › Cooling Experiments › Fan 24V overvolt!
New Posts  All Forums:Forum Nav:

Fan 24V overvolt! - Page 5

post #41 of 59
omg so far 2 120mm 180mm fans melted at 24v and 1 80mm fan died at 17v ;( now im left with ghetto fans. lol
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
dual core 3800+ monster geforce 8500 msi 512/ geforce 6100 nforce 400 1gig 
Hard DriveOSMonitorKeyboard
maxtor 150gig ubuntu xfce vr920 Liteon 
PowerCaseMouse
300w naked 4 button logitech 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
dual core 3800+ monster geforce 8500 msi 512/ geforce 6100 nforce 400 1gig 
Hard DriveOSMonitorKeyboard
maxtor 150gig ubuntu xfce vr920 Liteon 
PowerCaseMouse
300w naked 4 button logitech 
  hide details  
Reply
post #42 of 59
Quote:
Originally Posted by metalmodman View Post
omg so far 2 120mm fans melted at 24v and 1 80mm fan died at 17v ;( now im left with ghetto fans. lol
and you don't think overvolting the fans as you did isn't ghetto?
Monster Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 P5K Deluxe 3870 2X1GB Geil 800 MHz 
Hard DriveOptical DriveOSMonitor
4 x 250 barracuda's 2 x DVD Writers Windows 7 22" Acer LCD 
KeyboardPowerCaseMouse
Razor 600W GameXStream TT Armor Modded Razor 
  hide details  
Reply
Monster Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 P5K Deluxe 3870 2X1GB Geil 800 MHz 
Hard DriveOptical DriveOSMonitor
4 x 250 barracuda's 2 x DVD Writers Windows 7 22" Acer LCD 
KeyboardPowerCaseMouse
Razor 600W GameXStream TT Armor Modded Razor 
  hide details  
Reply
post #43 of 59
no now im saying im knee deep in ghetto! im stuck with odd shaped fans!
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
dual core 3800+ monster geforce 8500 msi 512/ geforce 6100 nforce 400 1gig 
Hard DriveOSMonitorKeyboard
maxtor 150gig ubuntu xfce vr920 Liteon 
PowerCaseMouse
300w naked 4 button logitech 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
dual core 3800+ monster geforce 8500 msi 512/ geforce 6100 nforce 400 1gig 
Hard DriveOSMonitorKeyboard
maxtor 150gig ubuntu xfce vr920 Liteon 
PowerCaseMouse
300w naked 4 button logitech 
  hide details  
Reply
post #44 of 59
I realize I'm bumping a very old thread, but at least I used search rather than posting a new thread. I have a specific question:

I have a bunch of Sunon PSD4812PMB1 24v-55v fans that draw .39a and would like to run six of them [for a total of ~2.4a] in a Corsair 750TX-powered system. While the 750TX provides 60 +12v amps, its -12v rail is rated for only .8a (typical for 12v PSUs)—only one third the draw of those six fans. Can someone who understands the laws governing electricity better than I do, explain whether or not this can be safely done, why, and from where the 2.4a of the six fans will be drawn if powered between the +12v and -12v rails?
Edited by TIGR - 5/11/10 at 3:19am
post #45 of 59
Quote:
Originally Posted by TIGR View Post
I realize I'm bumping a very old thread, but at least I used search rather than posting a new thread. I have a specific question:

I have a bunch of Sunon PSD4812PMB1 24v-55v fans that draw .39a and would like to run six of them [for a total of ~2.4a] in a Corsair 750TX-powered system. While the 750TX provides 60 +12v amps, its -12v rail is rated for only .8a (typical for 12v PSUs)—only one third the draw of those six fans. Can someone who understands the laws governing electricity better than I do, explain whether or not this can be safely done, why, and from where the 2.4a of the six fans will be drawn if powered between the +12v and -12v rails?
It's always ok to revive an old thread with relevant info.

I can't tell you exactly what you want, but I would suggest that you not use a PC PSU to power that many fans, as the -12v line is not designed for that. You can find 48v PSUs that do 1-10A for minor amounts of money.
The Fox Box
(16 items)
 
Macbook Pro
(10 items)
 
 
CPUMotherboardGraphicsRAM
Intel 3930K ASUS P9X79 ASUS GTX 570 DCII 4 x 4GB G.Skill Sniper 1600MHz LV 
Hard DriveOptical DriveCoolingOS
Intel 330 - 180GB LG HDDVD & Blu Ray Reader Cooler Master Hyper 612 Windows 7 Ultimate 64bit 
MonitorMonitorKeyboardPower
HP ZR30w Samsung 2243BWX Ducky! PCP&C 750w Silencer (coppa) 
CaseMouseMouse PadAudio
Lian Li PC-E8 G9x S&S Steel Onkyo Receiver/Design Acoustics 2.1 system 
CPUGraphicsRAMHard Drive
Core i5 2410M HD 3000 8GB 120GB SSD 
Optical DriveOSOSOS
Super Drive OSX 10.7.2 Win 7 Enterprise (In VB) Ubuntu 10.04 (In VB) 
MonitorPower
13" 1280x800 65w Magsafe 
CPUMotherboardRAMHard Drive
Q9300 Gigabyte P35 8GB DDR2 2TB WD 
Hard DriveHard DriveHard DriveHard Drive
2TB WD 2TB Seagate 1.5TB Seagate 1.5TB Seagate 
Hard DriveHard DriveHard DriveOptical Drive
1TB Hitachi 1TB Hitachi 500GB WD DVD-RW 
OSMonitorKeyboardPower
Win Server 2012 Headless/15" touchscreen Apple mini USB PC P&C 500W 
  hide details  
Reply
The Fox Box
(16 items)
 
Macbook Pro
(10 items)
 
 
CPUMotherboardGraphicsRAM
Intel 3930K ASUS P9X79 ASUS GTX 570 DCII 4 x 4GB G.Skill Sniper 1600MHz LV 
Hard DriveOptical DriveCoolingOS
Intel 330 - 180GB LG HDDVD & Blu Ray Reader Cooler Master Hyper 612 Windows 7 Ultimate 64bit 
MonitorMonitorKeyboardPower
HP ZR30w Samsung 2243BWX Ducky! PCP&C 750w Silencer (coppa) 
CaseMouseMouse PadAudio
Lian Li PC-E8 G9x S&S Steel Onkyo Receiver/Design Acoustics 2.1 system 
CPUGraphicsRAMHard Drive
Core i5 2410M HD 3000 8GB 120GB SSD 
Optical DriveOSOSOS
Super Drive OSX 10.7.2 Win 7 Enterprise (In VB) Ubuntu 10.04 (In VB) 
MonitorPower
13" 1280x800 65w Magsafe 
CPUMotherboardRAMHard Drive
Q9300 Gigabyte P35 8GB DDR2 2TB WD 
Hard DriveHard DriveHard DriveHard Drive
2TB WD 2TB Seagate 1.5TB Seagate 1.5TB Seagate 
Hard DriveHard DriveHard DriveOptical Drive
1TB Hitachi 1TB Hitachi 500GB WD DVD-RW 
OSMonitorKeyboardPower
Win Server 2012 Headless/15" touchscreen Apple mini USB PC P&C 500W 
  hide details  
Reply
post #46 of 59
Thanks Mootsfox—I have noticed 48v server PSUs are very inexpensive.

I wonder if it would be feasible to connect and mod a 48v PSU to be turned on and powered through a standard 12v PSU.
post #47 of 59
Quote:
Originally Posted by TIGR View Post
Thanks Mootsfox—I have noticed 48v server PSUs are very inexpensive.

I wonder if it would be feasible to connect and mod a 48v PSU to be turned on and powered through a standard 12v PSU.
I would take it that most 48v PSUs take a 120v AC source. So you don't nesscarily need a 12v source.

But I'm sure you could use a relay or something to power on the 48v PSU when your TX750 power on.

I get the feeling I've met you before
post #48 of 59
Quote:
Originally Posted by angelkiller View Post
I get the feeling I've met you before
Haha I do believe you're right.

Quote:
Originally Posted by angelkiller View Post
I would take it that most 48v PSUs take a 120v AC source. So you don't nesscarily need a 12v source.

But I'm sure you could use a relay or something to power on the 48v PSU when your TX750 power on.
The 48v PSUs I know of do indeed take 120v AC input and I was wondering how difficult it would be to power both PSUs (the 12v and the 48v) in a single system off a single AC power input. I haven't done it and don't have a 48v PSU handy, but wonder if one could just splice the 120v input from the 12v PSU's to also power the 48v PSU, and then as you said, add a "power on" signal relay so when the 12v PSU powers on, so does the 48v one.

Maybe it's a stupid idea, but if it's feasible, I could simply mount both a 12v and a 48v PSU in my high-end builds and use the many 24v+ server fans available to me for customers who need serious cooling performance. (Many of those folks have their systems located remotely so noise is not a primary concern for these builds; the highly available/inexpensive high-performance fans are ideal here, if only they can be used to their full potential).
post #49 of 59
Quote:
Originally Posted by TIGR View Post
The 48v PSUs I know of do indeed take 120v AC input and I was wondering how difficult it would be to power both PSUs (the 12v and the 48v) in a single system off a single AC power input. I haven't done it and don't have a 48v PSU handy, but wonder if one could just splice the 120v input from the 12v PSU's to also power the 48v PSU, and then as you said, add a "power on" signal relay so when the 12v PSU powers on, so does the 48v one.

Maybe it's a stupid idea, but if it's feasible, I could simply mount both a 12v and a 48v PSU in my high-end builds and use the many 24v+ server fans available to me for customers who need serious cooling performance. (Many of those folks have their systems located remotely so noise is not a primary concern for these builds; the highly available/inexpensive high-performance fans are ideal here, if only they can be used to their full potential).
I completely understand what you're saying.

It just seems like an unnecessary step to get the 48v PSU running off a 12VDC source.

But I don't fully know your situation so whatever works best for you.
post #50 of 59
Quote:
Originally Posted by angelkiller View Post
I completely understand what you're saying.

It just seems like an unnecessary step to get the 48v PSU running off a 12VDC source.

But I don't fully know your situation so whatever works best for you.
Really the main reason is for simplicity on the customer's part—so they can just plug in a single power cord and go. Sounds kind of silly.... But, well, I've learned that when it comes to building computers for people, the simpler I make things for them, the less headache medication I have to keep around for myself.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Cooling Experiments
Overclock.net › Forums › Cooling › Cooling Experiments › Fan 24V overvolt!