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LockedEVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's

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dejanh
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:08:30 (permalink)
SiriusDragon

I have added value, by stating that my setup works fine, and in turn showing that it IS possible to run a high end system perfectly fine on an E759 board, despite the protests of some people.

Yes, bad luck sucks. But making a blanket statement of 'OMG EVGA FAIL' seems a bit much.

I am quite sure EVGA will resolve this issue, just as they've resolved many other issues in the past.

Constantly bringing up ASUS on an EVGA forum thread about EVGA boards hardly adds any value to the thread either btw...


That is my point.  Let's keep it on topic.  There is a problem, let's find the cause and therefore the solution.
Nereus
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:08:31 (permalink)
can the monkeys stay? 
 

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dejanh
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:10:31 (permalink)
Nereus

can the monkeys stay? 



Certainly
YerBuddy
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:13:00 (permalink)
Nereus

can the monkeys stay? 



This may all be hilariously funny to you, but it doesn't make me feel any better...and it definitely doesn't help find a solution.  Please stay on topic.  All of us...please.
23JMZ07
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:14:43 (permalink)
LMAO @ Falcon
 
1) PLEASE start using YOU'RE instead of your when you're throwing out the crap from YOUR mouth..
 
2) Has there been an incidence of fire yet? NO so therefore I am correct as of NOW..
 
3) My mod is a great step up from the molex mod since it provides more wires back to the psu whilst keeping things neat.
 
4) OF COURSE it involves soldering? What do you expect, the fairy to come and magic the wires onto your board?.. If certain users cannot personally solder due to inexperience and or nerve then they may ask a professional to do it..
 
5) As of now, the solder mod is our ONLY option so dont slate it..
Finally if you were "invited" to this thread, it is quite clear that all you do is annoy other people so since you have stayed long enough maybe grab your coat and leave?
 
kthzbai
dejanh
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:14:56 (permalink)
YerBuddy

Nereus

can the monkeys stay? 



This may all be hilariously funny to you, but it doesn't make me feel any better...and it definitely doesn't help find a solution.  Please stay on topic.  All of us...please.

 
I think that was the intention, just to lighten the mood and get everyone talking properly again.
 
I am proceeding with the Molex mod after a few more tests are complete and will report back with my results.  After getting confirmation from Shannon on how the distribution and operation of X16 slots is on the Classified 3, that board will not work for me.
SiriusDragon
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:18:39 (permalink)
Argh... one last addition.
 
Soldering is so easy (due to the size of the connections that are being soldered) on those points even I could do it... and that's saying something as my soldering iron sucks and I haven't soldered for quite a while. But with a decent iron and some good solder it should be a reasonable enough mod to perform. Hardly any different from putting a waterblock on a gpu or cutting up a case for mod purposes...
 
I reckon all we need is approval from evga to be able to do this mod and still keep the warranty. OR alternatively some other kind of fix.
 
The idea of running wires to the 8 pin connectors is pure genius and a good use of their extra power.

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dejanh
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:21:34 (permalink)
SiriusDragon

Argh... one last addition.

Soldering is so easy on those points even I could do it... and that's saying something as my soldering iron sucks and I haven't soldered for quite a while. But with a decent iron and some good solder it should be a reasonable enough mod to perform. Hardly any different from putting a waterblock on a gpu or cutting up a case for mod purposes...

I reckon all we need is approval from evga to be able to do this mod and still keep the warranty. OR alternatively some other kind of fix.

The idea of running wires to the 8 pin connectors is pure genius and a good use of their extra power.


This approval will not come from EVGA officially in public.  You have to think about the implications of so many people doing this incorrectly and shorting their boards or destroying other components.  I know that it is easy and all but a lot of people are not careful or no nothing about electronics.  This is a huge liability.  Talk to them individually.  You will like what you hear.
SiriusDragon
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:29:22 (permalink)
dejanh

SiriusDragon

Argh... one last addition.

Soldering is so easy on those points even I could do it... and that's saying something as my soldering iron sucks and I haven't soldered for quite a while. But with a decent iron and some good solder it should be a reasonable enough mod to perform. Hardly any different from putting a waterblock on a gpu or cutting up a case for mod purposes...

I reckon all we need is approval from evga to be able to do this mod and still keep the warranty. OR alternatively some other kind of fix.

The idea of running wires to the 8 pin connectors is pure genius and a good use of their extra power.


This approval will not come from EVGA officially in public.  You have to think about the implications of so many people doing this incorrectly and shorting their boards or destroying other components.  I know that it is easy and all but a lot of people are not careful or no nothing about electronics.  This is a huge liability.  Talk to them individually.  You will like what you hear.

 
Maybe the fix could have conditions then. eg. we still cover damages not related to the fix, but we're not responsible if you stuff up the fix. That way people have choices on how to work out the best way to fix it for their situation.
 
It's unlikely for EVGA to recall and fix up the E759 boards, they're EOL and the appeal of them seems limited, ie. if you don't know what the NF200 is then you don't need it. So other than offering 4-way boards to people who 'need' the NF200 chips, I dunno how else they could deal with it.
 
I'm curious as to what PSUs people have been using, and also whether or not people game, or do benchmarks and if they use apps like Furmark or not. Furmark especially can cause a system to draw WAY more power than what it normally would - that's one of the reasons I tend to test my overclocks with vantage as it stresses the GPUs to more reasonable levels.
 
Edit:
For my situation, I'm upgrading to the E762 anyway... that should solve any issues with regards to power. Maybe I could get a P6T7 WS... but it's a workstation board and I want the OCability of the 4-way. Plus I've just had great experiences with EVGA products :)
post edited by SiriusDragon - 2010/10/12 17:32:43

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YerBuddy
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:43:50 (permalink)
Okay...I'm done.  I'll take my concerns to "the man" and see if I can get a little satisfaction.  It certainly isn't coming from this flaming and bickering.
nooberclocker
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 17:53:42 (permalink)
Yup... look at that....   
 
http://service.futuremark.com/compare?3dmv=2599870
 
that sure aint no asus board......
 
 
oh thats right   asus dual socket overclocking boards have been complete FAIL...
 
just go ask all of the crunchers at Xtreme systems about them..
 
Im sure they will welcome you with open arms 
 
and theres a reason EVGA classified boards led the market,  and it took board makers like Gigabyte and asus over a year just to catch up...
 
wow..... thats asus innovation there....
post edited by nooberclocker - 2010/10/12 17:57:24
badboy64
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 18:00:14 (permalink)
I have running this setup in my sig below for the last 3+ months and don't have any of the problem with the 24pin getting hot at all. It is cooler than anything in my computer. My system fully overclocked and even the 2x480 are running overclocked.

Processor Intel® Core™ i9 11900K CPU 3.5GHz@5.2ghz, Memory 2x16GB GSkill Trident Z Royal Elite RPG 4000 mhz Ram, Sabrent Rocket Q4, Motherboard eVga Z590 FTW WiFi, Operating System Windows 11 Pro 64-Bit, eVga 3090 FTW3 Ultra 24G, Monitor Acer CG437K, Logitech G910, Razer Lancehead Tournament Edition,Thermaltake Core P8, eVga 1300w P+ PSU, Custom watercooling.
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SiriusDragon
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 19:07:04 (permalink)
trilogy3337
Now I don't pretend to know all the pins on these boards, or in the PCIE slots. But can't a 1x or 16x "Blank" card be made that plugs into a PCIE slot that has a Molex on it that would supply power in the same way that a Molex plug on the MOBO would? 
I wouldn't think it would matter where between A and B you add the power as long as you add it. I'm sure some of the guys here could make something up quickly. I could be completely wrong, but sounds workable to me. Maybe someone who knows without a bunch of Drama can chime in on this? 

 
Crazy idea but maybe something like the REX3 4-way adapter. That way they can feed in as much power as they want into the slots. Could be a bit awkward though as it'd block the PCI slots and you'd have to have a different 'extender' for each board.
 
A better solution may be to have really short PCI-E risers that have a molex connector coming off them. That way people can just buy one of those per GPU. EVGA could chuck in some long mounting screws or short brackets or something so you can still slot things in like normal.
 
Practical? Impractical?
 
Edit: PCI-E x1 may not work as I think a lot of the extra PCI-E pins are actually for power purposes. Or is it vice versa and the extra pins are for signals? lol... can't remember exactly.

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Trilogy3337
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 19:14:05 (permalink)
yeah but like on the 759 in most cases the lowest PCIE16 slot can only be used for single slot with most cases, this slot would be able to be used to add the power. I know that wouldn't work for everybody, but I think it would cover a vast majority of the people involved.

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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 19:55:09 (permalink)
trilogy3337 and SiriusDragon  have some very good ideas!! I'm no engineer but I like their thinking.


henrich
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 20:05:42 (permalink)
Hello I have this config
 
EVGA x58 SLI Classified
Intel Core i7 920 @ Stock speed
Corsair H50
Corsair HX850
XFX Radeon HD 5870
 
Like everybody else Im worried took me 3 years to save to get this comp running and now feel like a treathen species lol, guess will have to shell out another 400 for the Classified 3, will be less than pay mobo, psu, memory and who knows what else could be damage.
 
Got only one gpu and of course CF or SLI is out of the question cause I dont want to blow my only computer :(.
 
Wanted to get a 480 for xmas :((((((( and SLI in a future sigh
 
Any advice, motivational words, cheers would be welcome right now
PIMPDURB
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 20:13:33 (permalink)
Great,
 
I just bought an EVGA 760 classified, 2 EVGA 480s, an i7 950 and a new corsair 1200 watt power supply.  I just opened my 760 classified yesterday.  Just noticed this thread today.  Wish i would have seen this thread earlier.  I just checked newegg about the return policy to upgrade to the E3.  The 760 classified has a "limited replacement only policy" while the E3 has "standard return policy".  Meaning i can't return the 760 for the E3. However, you are able to get a full refund for the E3.  Sounds like newwegg knows whats up too. Looks like its all a matter of time before my new $3000 system goes up in flames.  I just sent in a ticket to EVGA to see if they will replace my 760 for an E3. 

EVGA E770 (X58 Classified 3)
I7 950 (OC'd to 4.0GHz stable 24/7)
(2x) GTX480 SC in SLI
Corsair Dominator GT 6GB (3x2GB) 2000 DDR3
VelociRaptor 300GB
Seagate Barracuda 250GB 7200RPM Sata
Corsair CMPSU AX1200
Custom Water Cooling:
Radiator1: ThermoChill PA120 3x120mm 1/2 Barbs
Radiator2: ThermomChill PA120 2x120mm 1/2 Barbs
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GPU Waterblock: (2x) DD 480GTX Nickle Top/Bottom
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SiriusDragon
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 20:33:58 (permalink)
trilogy3337
yeah but like on the 759 in most cases the lowest PCIE16 slot can only be used for single slot with most cases, this slot would be able to be used to add the power. I know that wouldn't work for everybody, but I think it would cover a vast majority of the people involved.


I'd hope feeding power back in that way WOULDN'T work  Imagine what'd happen if a card had a power surge or whatever - it'd just feed back into the mobo. Hence I'd hope they'd have simple diodes or similar to block the flow if it's going in the 'wrong' direction. If it does work then it means the mobo lacks those diodes The way I see it the only thing going back into a PCI-E slot should be return data.
 
As for the NF200 discussions... people seem to keep forgetting that nvidia surround relies heavily on the PCI-E bandwidth in order to transfer images between the cards. While it may not matter if you're running a single monitor, it certainly would make a difference to a 3-way or 4-way surround setup. I could have sworn I read somewhere that nvidia recommended x16 pci-e speeds for surround...
 
You could argue the NF200 is just a bridge chip, maybe so... but it does allow the cards to communicate directly instead of via the northbridge.

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dejanh
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/12 20:37:06 (permalink)
PIMPDURB

Great,

I just bought an EVGA 760 classified, 2 EVGA 480s, an i7 950 and a new corsair 1200 watt power supply.  I just opened my 760 classified yesterday.  Just noticed this thread today.  Wish i would have seen this thread earlier.  I just checked newegg about the return policy to upgrade to the E3.  The 760 classified has a "limited replacement only policy" while the E3 has "standard return policy".  Meaning i can't return the 760 for the E3. However, you are able to get a full refund for the E3.  Sounds like newwegg knows whats up too. Looks like its all a matter of time before my new $3000 system goes up in flames.  I just sent in a ticket to EVGA to see if they will replace my 760 for an E3. 


henrich

Hello I have this config

EVGA x58 SLI Classified
Intel Core i7 920 @ Stock speed
Corsair H50
Corsair HX850
XFX Radeon HD 5870

Like everybody else Im worried took me 3 years to save to get this comp running and now feel like a treathen species lol, guess will have to shell out another 400 for the Classified 3, will be less than pay mobo, psu, memory and who knows what else could be damage.

Got only one gpu and of course CF or SLI is out of the question cause I dont want to blow my only computer :(.

Wanted to get a 480 for xmas :((((((( and SLI in a future sigh

Any advice, motivational words, cheers would be welcome right now


Hi guys,
 
First, don't panic
 
@henrich - you have a nice system right now and no need really to upgrade for a bit of time still.  You will not see that much difference from the GTX480s to warrant going SLI as you were thinking.  Just stick it out with the single HD5870 for now and by the time you are ready to upgrade I am sure there will be a publicly available fix for this issue.  Adding to this, I sincerely doubt that this is something that would how up on every board and with every combination so chances of you seeing any problems are pretty small.  Especially if you are sticking it out with a single GPU you are even less likely to run into problems.
 
@PIMPDURB - if it is any consolation I have done some extreme load testing (LinX and FurMark 1.8.2 in Xtreme Burning Mode with Displacement mapping enabled) with the Corsair AX1200 in the same E759 that burned my Antec TPQ-1200 OC.  The connectors do not seem to heat up at all and in fact are just lightly luke-warm to the touch.  This is certainly a fair cry from something that is overheating and about to melt.  There is still no verdict on this possibly being a problem that is a combination of factors, the GPUs, motherboard, and certain PSUs.
 
 
dejanh
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 21:08:40 (permalink)
Hmmm...here's something that I thought about...low voltage burn out.  Is it possible that is playing a part here?
 
A weaker and/or unstable voltage on the power supply +12V rail could result in voltage that is too low to properly start/operate the system under load and could create high current/low resistance situations that would eventually cause the connectors to overheat and burn up.
 
Possible?  No? 
post edited by dejanh - 2010/10/12 21:11:41
SiriusDragon
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 21:09:44 (permalink)
whodaddy
enough already


I give up anyway, this discussion is going in circles

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 21:15:08 (permalink)
SiriusDragon

trilogy3337
yeah but like on the 759 in most cases the lowest PCIE16 slot can only be used for single slot with most cases, this slot would be able to be used to add the power. I know that wouldn't work for everybody, but I think it would cover a vast majority of the people involved.


I'd hope feeding power back in that way WOULDN'T work  Imagine what'd happen if a card had a power surge or whatever - it'd just feed back into the mobo. Hence I'd hope they'd have simple diodes or similar to block the flow if it's going in the 'wrong' direction. If it does work then it means the mobo lacks those diodes The way I see it the only thing going back into a PCI-E slot should be return data.
 

Uhm, if x connector in PCIE connector is for +12v, then it would only be connected to +12v lane, if anything spiked a PSU would spike. I've lost hardware to PSU failure before. A GFX card can only consume power, not produce it. And even if such a thing happened, it would be dumping that power who knows where from the direct short as a result of whatever went poof.
 
And if you guys are going to bicker and argue about things not about this thread, Quit quoting me. I am getting tired of reading page after page of some people's gibberish. This is a thread about and for 759 and 760 owners and high end GPU's. Not debates of features, and other brands. 

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Trilogy3337
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 21:18:08 (permalink)
dejanh

Hmmm...here's something that I thought about...low voltage burn out.  Is it possible that is playing a part here?

A weaker and/or unstable voltage on the power supply +12V rail could result in voltage that is too low to properly start/operate the system under load and could create high current/low resistance situations that would eventually cause the connectors to overheat and burn up.

Possible?  No? 


Thats not a bad idea, I remember when I put my first TRI-SLI system together with 8800GTX's and hit the power switch the first time on the test bench. The lights dimmed, hence why I now have twin 20A dedicated circuits for my PSU's.

EVGA X79 Dark
Intel 4820K on HK3.0
16GB worth of Vengeance
EVGA 1300G2
EVGA 660TI
EVGA 660TI
EVGA660SC
SSD's Galore
 
Heatware: http://www.heatware.com/eval.php?id=72898
SiriusDragon
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 21:26:14 (permalink)
trilogy3337

SiriusDragon

trilogy3337
yeah but like on the 759 in most cases the lowest PCIE16 slot can only be used for single slot with most cases, this slot would be able to be used to add the power. I know that wouldn't work for everybody, but I think it would cover a vast majority of the people involved.


I'd hope feeding power back in that way WOULDN'T work  Imagine what'd happen if a card had a power surge or whatever - it'd just feed back into the mobo. Hence I'd hope they'd have simple diodes or similar to block the flow if it's going in the 'wrong' direction. If it does work then it means the mobo lacks those diodes The way I see it the only thing going back into a PCI-E slot should be return data.
 

Uhm, if x connector in PCIE connector is for +12v, then it would only be connected to +12v lane, if anything spiked a PSU would spike. I've lost hardware to PSU failure before. A GFX card can only consume power, not produce it. And even if such a thing happened, it would be dumping that power who knows where from the direct short as a result of whatever went poof.

And if you guys are going to bicker and argue about things not about this thread, Quit quoting me. I am getting tired of reading page after page of some people's gibberish. This is a thread about and for 759 and 760 owners and high end GPU's. Not debates of features, and other brands. 


Sorry, I thought that suggestion was relevant to fixing this. GPUs don't normally feed power back into the mobo, which is why I'm not convinced your idea would work. It'd be nice and easy if it did though, and cheap to make.
 
As for the NF200 discussion, I dunno. It's like a zombie, it always comes back alive x.x

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 22:03:16 (permalink)
Ok guys sorry for the long post in advance.
 
I ave soem ideas as to how this whole situation can be happening.  Anyone familiar with the term "Press fit"?  its when 2 items (one male the other female) slip fit together and the tolerance is very close (usually the female end is actually a thousandth or so smaller than the male end so that the male end will stretch the female end outwards for a tight secure fit)
 
your psu connections work in a similar fashion,  when connecting the 24pin you have the female end in the PSU side of the 24 pin connection.... they are barrels of thin metal that will clamp tightly around the pin it slides on to.  Now this is the interesting part.... when you press fit,  the female end will usually deform outward a little making that press fit not as tight each time you plug it in...  each time you plug it in it gets a little looser and looser....    now lets get to electricity.... anyone who works with electricity... lets say automotive,   using a spade connector is  apretty popular one.  Unplug and replug the same spade connector and it will get looser and looser unless you crunch it back tight again with pliers...  if you dont that connection gets warm,  and if it gets loose enough it can get downright hot,   even hot enough to burn the wire or plastic sheathing.   now lets get back to our poor little 24 pin psu connector tahts been plugged in 30 times during your cable management sessions or in my case bench sessions....   now that 24pin female barrel end is starting to get loose on the pin right..... your gonna start getting heat buildup,  especially with a heavy draw on it...
 
I think taht is a pretty good explanation of what i think is causing this...
 
Hell I ost a PCP&C 1200 on a Rampage extremem 775 board when it was running a 8400 GS card doing 2d benching.... and guess where it burned?   24 pin....    its all about the connection guys...   and hey lets say the 24pin PSU female side is a little loose from the factory,   then you can have a hot 24pin only plugging it in once...
 
anyone willing to try it... I would like to see anyone who says they have a hot to teh touch 24pin unplug it and use a pick or sharp tool to pinch the little barrels shut so they grab the pin tighter, and see if the plug stays cooler   :)
 
this could be why EVGA is having such a hard time reproducing this is theyre psu's are in too good condition
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 22:06:49 (permalink)
Here this post
http://www.xtremesystems.org/forums/showthread.php?t=226942
 
Shamino even stated that high power consumption gpus will cause the 24pin to burn thus sharing the molex mod. Yes a poor connection can cause this, but so can 2x+ gtx 480's or the right combination of ati cards.
post edited by donta1979 - 2010/10/12 22:11:07

 
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 22:18:01 (permalink)
donta1979

Here this post
http://www.xtremesystems.org/forums/showthread.php?t=226942

Shamino even stated that high power consumption gpus will cause the 24pin to burn thus sharing the molex mod. Yes a poor connection can cause this, but so can 2x+ gtx 480's or the right combination of ati cards.


thus my belief that its the female on the psu getting too warm,  and that is melting therefore melting the connector on the board...
 
adding the molex removes load from the 24pin
 
now i am wondering if maybe just loose connector tied with high draw if the combination....
 
thats why I asked the few in here taht said theyre 24pin was hot try what I suggested.  lets see if we can put this to bed :)
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 22:18:58 (permalink)
So, im pretty new to the community.  Is there a way to post polls  in these forums?  Im curious to know how many people other than Donta have had their 24 Pin actually melt from and SLI set up with a 759 or 760 mobo.  If its possible can someone start up a thread that shows the polling?  Just want to get an idea of how many people in the EVGA community have had this specific problem with 759/760 boards. 
 

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 22:36:54 (permalink)
Yes that would hold true but I have been though 3x psu's due to this issue, first couple times it just burned out my psu, the antec 1200w did it in. I dont think all three of them had poor connectors. Thermaltake Toughpower 1000w"no modular cables", Corsair 1000hx, and an Antec TPQ 1200w. so its more than just a bad connection. At least the first two psu's just died and didnt do anything the antec tpq 1200w just kept going  then bad bad stuff started to happen...

As shamino has stated what happens is that connector gets too hot, causing the melting of plastic, the pin on the psu will darken from extreme heat. The psu starts pumping massive voltage into the 12v's on the 24 pin to meet the demand of the gpus power draw from the mobo as shamino stated he made the pcie lanes stronger than normal to keep them from burning up from high power consumption gpus. But only so much power can go though due to resistance. The end result is a burned 24pin, dead psu, dead hardware, and if the psu goes off the deep end can cause a ton of issues. even a fire. What the molex does is solves the issue of the power demands, enough gets to the board for the pcie slots allowing the 24pin to stay cooler on its 12v pins because the amount of power that was being pumped though there has been greatly reduced, basically lessening the load on your 24pin. Pretty simple concept really. But your right a poor connection can cause this too.
We can talk about the cause as much as you like but shamino already stated the reason on his post on xtremesystems, like the beefing up of the pcie lanes the reason for the molex mod, but the last thing to complete the board would had been the molex adapter on the board. That is why the Classified 3 has one to keep this kind of thing from happening.
 
There is no mystery, or magic that makes this happen just a simple design flaw that should had been carried though and not been a mod. It could be in some cases just bad luck of a 24 pin connection but that could happen to anyone with any board.
post edited by donta1979 - 2010/10/12 22:49:51

 
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/12 22:46:15 (permalink)
PIMPDURB

So, im pretty new to the community.  Is there a way to post polls  in these forums?  Im curious to know how many people other than Donta have had their 24 Pin actually melt from and SLI set up with a 759 or 760 mobo.  If its possible can someone start up a thread that shows the polling?  Just want to get an idea of how many people in the EVGA community have had this specific problem with 759/760 boards. 



Yes look at my first post and go though the links there are other people, as for a poll only mods can do the poll, and not everyone that has these boards post on these forums. there is a wealth of information in that wall of txt in post 1. Links included.

 
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