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24-pin ATX power plug meltdowns: Need user data from unaffected computers

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thePoison
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2011/12/11 10:18:18 (permalink)
I am sure your 24 pin melt down has nothing to do with your 4+ GHz overclock and inferior power supply selection at the time. Now I suppose this goes without saying, but having the cards at stock and the processor as well you would have never experienced this mishap.
post edited by thePoison - 2011/12/11 10:21:58

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kaninja
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2011/12/11 12:38:50 (permalink)
thePoison

I am sure your 24 pin melt down has nothing to do with your 4+ GHz overclock and inferior power supply selection at the time. Now I suppose this goes without saying, but having the cards at stock and the processor as well you would have never experienced this mishap.

 
CPU overclock has nothing to do with melting the +12V pins on the 24 pin connector.  It only has to do with PCI-E subsystem current draw through 2 measly wires.  I've seen 3 stock clocked cards melt the connector in a single day.

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#32
magicdragon_88
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/24 00:48:39 (permalink)
thanks for such great info guys..Exact same thing happened to me and i have a couple of questions.
 first of all, these are my pc specs
i7 950@4ghz ( now running stock everything)
6gb ddr3 corsair xms3 1600 ram
windows7 hp 64bit
gtx 460 1gb SLI
a lot of peripherals like joysticks, sound system, cameras( almost use up all of my USB ports on the back of the PC)
and a 4 month old OCZ zx1250w 80plus GOLD PSU
 
Everything was fine for these first 4 months until i had troubles booting up my pc once in a while..1 out of 10 times the screen would just stay black and windows would not boot..then today, once i tried to turn on my pc, no power was getting to ANY device that was hooked up to the motherboard...i noticed this because all of the fans, including the cpu, case and video card fans, were not spinning, while the fans which were connected to the molex connectors via the PSU were.
 
I unplugged the ATX connector and sure enough the 10th and 11th pins were burnt, with melted plastic that dripped onto the motherboard pins.So after a while of sand papering and scraping off the plastic from the pins, i plugged everything back in and my pc started up(but now im running only one video card). After reading this post i kinda understand why this may occur, but im not sure what to do from now on.
 
Should i get a new psu or motherboard to prevent this from happening again? Or am i stuck with using just one GPU so that not so much power is going through those wires?
 
Roman
 
PS: i had an antec 850bronze psu before, and while running the same set-up i did not encounter this problem. unfortunately with my high overclock and many usb devices connected at once, that psu was not enough to run that set-up, so i sold the PSU. 
 
#33
KMoore4318
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/24 03:51:52 (permalink)
have you looked at the Power Boost, do you have a spare PCIe slot to plug into?
http://www.evga.com/products/moreInfo.asp?pn=100-MB-PB01-BR&family=Accessories - Hardware&sw=4 
 

http://www.youtube.com/v/N9SLjiR7Q4s&rel=0&hl=en_US&feature=player_embedded&version=3"></param><param  
   
   
 
post edited by KMoore4318 - 2012/02/24 03:56:38

  
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magicdragon_88
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/24 13:45:38 (permalink)
yes i've looked into the power boost, and would certainly buy it, but i have an asus rampage 3 gene motherboard, with x2 PCIE slots and one PCI4 slot in the middle of them(the tiny black slot)..but since its a micro ATX motherboard, this small PCIE slot is completely covered up by the two video cards..
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/24 16:56:11 (permalink)
The power boost is low profile enough to fit under a dual card, I took electrical tape and put it on the edge of my card, just to eliminate the posability of a short, ( probably over kill)  EVGA says, it doesn't matter if you use 1X, 4X,8X, or a 16X slot, So I know that's fine for a EVGA board , assume it's the sane for Asus

  
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/24 18:03:34 (permalink)
thanks ill give it a try...but it looks like a VERY tight fit..i mean it seems like i have 3-4mm to work with. Can you confirm that this "power boost" works, KMoore?
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/25 02:28:31 (permalink)
I have one under a 580 in my 760,

  
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magicdragon_88
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/25 13:34:34 (permalink)
thanks a lot KMoore, i guess ill be ordering this power boost soon...but i got another question: the ATX cable i have plugged into the motherboard is the burnt one..should i replace this cable? and if i have to, do i need to buy a whole new PSU or can i just buy any 24 pin atx cable separately? also, how bad is it to operate the pc with this burnt cable?
#39
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/25 13:41:54 (permalink)
I am not sure of your sauder skills, you can cut away any burnt plastic, clean or replace any Pins, and be fine. You want to make sure you have a good clean connection, as resistance causes heat, and it's the heat that causes the burn.



  
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magicdragon_88
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/25 16:36:12 (permalink)
yup but in my case, the motherboard pins are clean ( after sanding them) What im worried about is the the atx cable.  the plastic melted off of it and there is exposed metal on 10th and 11th 12v wires, kinda of like the metal housing in which the motherboard pins are inserted...
 
could this whole problem  been the reason why my pc was sometimes not booting?
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/02/25 16:50:06 (permalink)
magicdragon_88

yup but in my case, the motherboard pins are clean ( after sanding them) What im worried about is the the atx cable.  the plastic melted off of it and there is exposed metal on 10th and 11th 12v wires, kinda of like the metal housing in which the motherboard pins are inserted...

could this whole problem  been the reason why my pc was sometimes not booting?

I have heard of No boot ( or intermident boot Issues with other people talking about the same issue) You can do amazing things with a roll of black elecrtical tape. But I personaly perfer, heat shrinK, and like to use the color that matches the code in the diagram above. IE Yellow for +12V, Black for ground, red for +5. I also throw old componants in a box in the attic, because you never know when you may need an old connector, off a failed componant. Often the connectors just have a finger that sticks out, that locks a pin in place, the right sized tube will allow you to extract them. The hard part is finding the right sized tube.

  
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Uranium-235
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/04/25 18:06:29 (permalink)
hey hey, finally found something on this problem, and have some news about it. First here is my box
 
I7 920 (right now at 2.8)
Asus P6T V2 Deluxe
2xXFX factory OC 285 SLI
Corsair 850 tx
 
pics..

 

 
(I know its not as bad as some of yours)
 
My first 850tx I had for..like...2 years. I didn't even notice this problem. Suddenly, after two years, my power supply started shutting down during gaming. I used online PSU calculators and it says my system is drawing about ~770 watts
 
I found the connector like that. One thing I noticed is the heat somehow caused some kind of corrosion inside each of the female connectors on those two pins. I would get my plyers, close the connector tight, take a paperclip, clean out inside the pins, and connect it and re-connect it over and over, scraping some of that corrosion off. Playing after that the wire temp would drop for a day or two. But the power supply kept shutting down more and more. I would guess that this corrossion is essentially decreasing the contact surface between the female atx plug and the make atx connector on the motherboard. essentially taking the overall guage of the connector down. With the added power draw, this is whats causing it to get so hot, at least one of the reasons.
 
I RMA'd it to corsair and got a new one about 5 months ago, shutting down problem was solved...till now. It started two days ago. Sounds like over current protection is kicking in, even though I dont' think i'm drawing more then 850. I'm only guessing somehow the 12v1 is drawing so much from that rail that its weakening some of the overcurrent protection components.
 
tell me what you think. never tried this soldering  a 12v molex. I'm not only a technician but I have this hobby of replacing caps (notice those pics are hosted from badcaps . net). So soldering skills are very much no problem with me ;)
#43
Uranium-235
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/04/25 18:10:43 (permalink)
damnit, pics aren't showing up, i'm guessing since i'm a new member and have the same restrictions as url's
 
I bet if I post the url it will go bye bye too
#44
KMoore4318
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/04/25 18:12:30 (permalink)
Uranium-235

damnit, pics aren't showing up, i'm guessing since i'm a new member and have the same restrictions as url's

I bet if I post the url it will go bye bye too


once you get your 50 posts you will be able to post Pics.
post edited by KMoore4318 - 2012/04/25 20:36:21

  
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Uranium-235
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/04/25 19:12:16 (permalink)
seriously? you delete my post? I can't post pics, have a valid problem, and need pics to show it. You KNOW i'm not a spammer but am treated like one. Are you going to ban me next?
 
evga just went -1 in my eyes
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KMoore4318
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/04/25 19:15:31 (permalink)
Uranium-235

seriously? you delete my post? I can't post pics, have a valid problem, and need pics to show it. You KNOW i'm not a spammer but am treated like one. Are you going to ban me next?

evga just went -1 in my eyes


Thats just the way the system is set up, 50 posts for pic's, or to enter the seller section , Who are you acusing of deleating, I saw no mod post in the thread,
post edited by KMoore4318 - 2012/04/25 19:20:25

  
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#47
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/04/25 20:15:01 (permalink)
don't know WHO but my previous post was deleted. It had a link to my atx connector pic, link made with spaces between the last dot, bypassing the 'no url' rule.
 
wish they would at least allow attachments in posts
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dukenuke88
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/04/25 20:34:17 (permalink)
I blew up my 24 pin using only two GTX 580s...STOCK too
 
From now on, I am using the EVGA power boost or motherboard external power plug.  I don't like risking it
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/04/26 16:47:49 (permalink)
well I *think* I pretty much fixed my problem (though probably temporary, as I might have to keep doing it). Here is what I did
 
broke the plastic around both of the pins ('twas brittle anyways cause of the heat). Got some needle nose plyers and gently yet firmly clamped down each pin, not all the way, but firmly. (with the PSU switch off) poured 91% isoprobyl on the pins, and quickly got a small paper clip and 'plunged' each pin several times. Now i'm playing dragon age and its barely warm.
 
so this is related to more then just heat, but possible some kind of chemical reaction from the added heat over time, and maybe such a great power draw
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/05/24 01:48:23 (permalink)
I had a similar problem:
 
Configuration:
 
Asrock G31M-S motherboard with E5200 and 2GB DDR2 ram
Asus ENGTS250 with 512MB
Lousy Q-tec 500W PSU (+12V@18Amp single rail)
 
The PSU connects to the motherboard through an ATX 20-pin connector in a 24-pin slot. This is acceptable according to the Asrock site. The graphics card connects to the PSU via a standard Molex to 6-pin converter cable. While running, the PSU is measured with a DVM and +12V fluctuates from 11.98 to 12.12 (probably worse due to the DVM delay, and I have no scope available) under stress (FurMark). The motherboard sensors are then reading as low as 10.1V while the +12V lead on the ATX connector is browned because of the heat.
 
DVM reading on the graphics card +12V leads is the same as directly on the PSU. Surprisingly the 4-pin auxiliary power connector for the CPU also gave the same +12V reading as both the PSU directly, and the connectors on the graphics card. There seems to be a design flaw in both the motherboard and the graphics card. The Winbond chip is measuring the voltage correctly at its leads (much lower than delivered by the PSU), so there seem to be several flavors of +12V available on the motherboard.
 
The graphics card is pulling way too much current from the motherboard PCI-E connector (max. 75W) while the PCB strands are unable to supply that current.
 
The Asus (Nvidia) GTS-250 card is build to comply with the ATX 12V 2.2 specification. On a multiple (+12V) rail power supply that means that power comes from the PCI-E slot (+12V1DC through the ATX 24-Pin motherboard connector, max. 75W) and the 6-Pin additional connector supplies a second +12V circuit (+12V2DC) that supplies the remaining power (max. 150W). For single rail power supplies, the card should come with a jumper that connects both +12V circuits to the 6-Pin connector. With a single rail supply there are two paths to the same supply; this results in most current being drawn through the path of the least resistance.
 
This also results in a higher resistance from the PCB traces and the voltage drops near the PCI slots and the temperature across those traces (and the ATX 20-pin connector) rises; hence, the lower sensor reading on the Winbond chip, which is located near the PCI slots.
 
I remedied this situation by adding additional +12V wiring on the soldering side of the motherboard PCB (24-Pin ATX), same way as the author of the thread.
 
Having tested the system with this modification, voltages near the Winbond chip (and the PCI slots) still dropped too much, though less than before, so I decided to connect an additional +12V wire to the graphics card PCI-E +12V supply circuit.
 
Finally, I have a stable +12V on all required locations and the Winbond sensor reports an acceptable reading (slightly lower than the DVM reading; the difference being equal under stress and idle conditions).
 
Test: FurMark burn-in test at native resolution (1680x1050)
 
Result: negative fluctuation: 1.44% - positive fluctuation: 0.3%  (HWInfo log).
 
Maximum allowable fluctuation +/- 5% (from +11.400 to +12.600)
 
Before the modifications, the minimum (sensor) voltage was 10.1V (15.8%)
 
Cannot post pictures (yet).
#51
KMoore4318
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/05/24 04:38:34 (permalink)
nebbukadnezzar

Cannot post pictures (yet).


Something like this ?

 

 

 
But keep in mind the Powerboost is only about $10 , does not void warrantee , and will work in all manf boards

(belive they have lowerd price since above pic was made)
Update:  Confirmed the new Price is $10
 
I hope you don't mind me posting Pic's I kew you didn't have the 50 posts to do so, and thought others might want to see it.  There is also a thread to do a mod to make a EVGA USB 3.0 card take on the charastics of the Power boost as well so you can use one slot to handle both functions, 
  
http://forums.evga.com/tm.aspx?m=777270&high=yellow+12V
post edited by KMoore4318 - 2012/05/25 04:13:33

  
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#52
nebbukadnezzar
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/05/24 23:32:15 (permalink)
Yes, that is what I did; I tried to find some additional +12V soldering points near the PCI-E slots and the Winbond chip, but those contacts are too small to solder a wire without ruining the motherboard. I did solder an additional +12V to the PCI-E circuitry of the graphics card and that will probably function the same way as the EVGA power booster. It is not that I'm unwilling to spend $10, but I wanted to analyze the problem and confirm that the problem originated in the double +12V path to the graphic card. Measuring the +12V leads on the PCI-E connector and the 6-Pin additional +12V connector confirmed that those circuits were separate.
 
Users of the VGA power boost should be aware that the Molex connector connects to an appropriate rail, as the motherboard gets its power from +12V1 and the 4-Pin CPU connector from +12V2; connecting the EVGA power boost to any other rail than +12V1 will combine that rail with +12V1. It should connect to the +12V1 rail.
#53
KMoore4318
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/05/25 04:20:18 (permalink)
nebbukadnezzar

Users of the VGA power boost should be aware that the Molex connector connects to an appropriate rail, as the motherboard gets its power from +12V1 and the 4-Pin CPU connector from +12V2; connecting the EVGA power boost to any other rail than +12V1 will combine that rail with +12V1. It should connect to the +12V1 rail.


Thats one of the things I like about the Corsair AX1200 it has a single rail 12V design, No worries about hunting down which rail to use, or deviding loads between rails, where as with a PSU like the HX1000, you do have to consider rail division, also some PSU's may have up to 6 rails,

and many EVGA boards have this built in already (770


762 
 

  
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#54
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/05/25 10:50:34 (permalink)
And this is exactly why I have a good psu and surge protector.

i9 10850k
Asus ROG Strix Z490-E
EVGA RTX 3080 FTW3 Ultra
Corsair Dominator Platinum 64gb
WD Black 1tb NVME
Corsair 5000D Airflow
EVGA 1200 P2 psu
EVGA Nu Audio Pro
Corsair H150i 360 Elite Capellix
 
 
 
#55
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2012/05/30 01:23:36 (permalink)
Since there is always room for doubt, I bought myself a new PSU (OCZ ModXStream Pro 600W) which has two +12V rails, each capable of supplying up to 25A. The motherboard wiring (ATX 24-Pin and ATX 4-Pin) was all connected to the +12v1 rail; the 6-Pin connector on the GTS-250 connected to the +12v2 rail.

I disconnected the additional wiring I made from the GTS-250 to the +12v1 rail, and started some tests (Furmark). During the tests the voltage measured (HWiNFO64) by the Winbond chip dropped to 10.9V, so there was no improvement whatsoever.

After reconnecting the additional wire from the GTS-250 PCI-E circuitry to the +12v1 rail, the same tests resulted in voltages from 12.038 to 12.197 (+0.32 % to +1.6% as calculated from +12V).

Conclusion: just a new (and possible better) PSU does not solve these problems.
#56
refugee1974
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2013/05/02 05:29:12 (permalink)
Well, I can't post a link due to the restrictions, but here's a device that will not take up a PCI slot and will not require soldering. I got it at the xoxide website.

#57
refugee1974
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2013/05/02 05:30:55 (permalink)
It's called Add2PSU and can be found under Power Supply Mods & Accessories.
#58
fusionssl
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2013/05/02 06:08:53 (permalink)
sorry dude that will not work, the issue is not that there is not a good power supply , but more of the mother board standard connectors are under rated for the current being drawn throw them.

 
 
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#59
biscuit1
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Re:24-pin ATX power plug meltdowns: Need user data from unaffected computers 2014/07/01 19:54:54 (permalink)
digging up an old thread , but this just happened on my B-stock 750i FTW board . Been having the issue of intermittent no - boot but all the fans powered on . Had no burnt connectors at the time & running a 460 w/a 550ti for PhysX . Tech support was at a loss on the issue .  It reared it's ugly head again when I installed 2 470s in sli , but they were on their own dedicated psu (go figure) . Burnt pins 10 & 11 along w/psu connector . Hardly used the pc with the cards in it , no gaming done on it .

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#60
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