This post is here to inform you that your 759/760 boards have an issue with getting enough power to high end power consumption gpus nvidia 480 series in sli/tri sli/quad sli, ati cards from the 38xx series to 48XX HIGH END MODELS ONLY that we know about at this point .
Ok had time to calm down... the hardware that is gone is gone. It is not EVGA's responsability to replace it unless it was one of thier parts and its under warranty. The C3 was a nice thing for them to do they didnt have to do it they could had just given me a 759 board and said gl to you. Leaving me to mod it myself, sell it find a replacement or just go with it and deal with the same issue again later...
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Here are a few links so you know I am not making this stuff up and supports my claim http://forums.evga.com/tm.aspx?m=536713&high http://forums.evga.com/tm.aspx?&m=201924&high=corsair+hx1000&mpage=2 http://forums.evga.com/tm.aspx?m=500697&high=raw2dogmeat http://www.hardwarecanucks.com/forum/video-cards/35555-e760-classified-mobo-sli-gtx-480s-melted-24-pin-connectors-3.html#post420538 Jacob posted this, this is not limited to the 759/760 classifieds other first generation x58 extreme overclocking boards from other vendors are affected as well.
http://www.overclockers.c...howthread.php?t=651336 http://www.xtremesystems....ead.php?t=243670 So at this point it was just not the Classified any early generation X58 Extreme ocing board with the right combination of gpus/hardware will cause this.
From one of the Engineers of the board Shamino on Xtremesystems As linked
here for the molex mod... GO TO THAT LINK AND READ IT ALL... Those of you with 760/759 boards suggest doing this or paying to have it done to keep your computers going you do not want to go though what others and myself have gone though... The link will prove that it was known that it would happen with ATI cards in these boards construction, nvidia cards at that point in time didnt consume as much power. It should had been a red light to add a molex somewhere on the board if you ask me.
From Link Above
LardArse
Exteme Systems Forums post Note for those running heavy oc'ed Quadfire 4890 LardArse Whem making the Classified I did take precaution to increase trace thickness for the 4 PCIE slots for the 3 groups of power. As before when overclocking quad fire 3870 I found they eat a lot through pcie slots. This way the trace does not burn up, or restrain cards oc in quad fire. However as there are only 2 +12v yellow wires, the connectors thus get hot at the 24pin ATX. I myself have melted the 24 pin ATX connector when running 4 x 4890 oc. I dunno why these cards draw so much from slots, the nvidia cards dont seem to 
Anyways if you are one of those quad fire guys this may help you.
As the quote and link from xtreme systems indicated they knew it would happen and didnt follow though with adding a molex for the pcie lanes on the board thus posting a molex mod to remedy the issue from happening.
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Cause The cause of this is simple a board that is pretty much getting most of its power for all of its components though the 24 pin power connector. With the right cominbation of gpus it seems both ati/nvidia that power draw becomes too great. The result is the 24pin's 12v pins having to try to pump too much power into the board, but there is resistance they where not made to supply that much power though the 12v pins. This results in those 12v pin heating up, melting plastic even scorching the metal from all the heat/resistance generated though those 12v pins. Some people get lucky and the psu just dies, others get the melting affect as the psu keeps pumping more power into the 12v pins on the 24pin. It could eventually go down the deep end taking other components out with it when it dies or worse catch fire but that is rare but still could happen.
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GPU's that we know about right now ATI "that we know right now"
38XX top ends in Quad Fire
4890 in Quad Fire
58XX xfire to quad fire
Nvidia "What we know right now"
GTX 480's in sli or tri or quad with some type of hardware configuration
GTX 470's and below unknown ------------------------------------------------------------------------------------------
Your Options as a 759/760 owner. Those of you with 759/760 boards with HIGH POWER Consumption GPU's have options
1. The information is here in this post you didnt know now you know you can attempt to do the mod yourself, ask or pay someone else to do it for you.
2. Just keep running your system the way it is and pray nothing happens, if it does when your there trying to salvage what is left you cannot blame anyone else. I would suggest #1 if your going to keep the board and have no desire to replace it. If it burns out yeah EVGA will be nice enough to give you a brand new Classified 3. But at what cost dont be like me"I didnt know about this until it happened to me", I lost ram, possibly a Killer 2100 card, a dvd/cd slim drive designed by voodoo PC exclusivly for my case that cannot be replaced, 3x power supplys, 3 hard drives, and of course my 759 board. I really wish I had known about this would had done the mod, and this post would had never existed. Antec still has not gotten back to me about an RMA so yeah out of a third psu.
3. Buy a new motherboard you know EVGA C3 will be safe so will the other vendors but after using other vendors over the weekend to today... Im sorry other vendors boards may overclock like champs but there is a big loss in control of your bios settings, some are also very picky on what ram you put on them.
4. Step-up if your board is in the stepup date range you can do this, I dont think evga will be extending stepup dates for people who have had the 759/760 boards for over a year now, nor have past the 90 day stepup time frame.
The jet engine in the car thing is funny but a bad compairison this is more like buying a car or even a jet, but lets just use a car, say it has weak manifold studs over time they will eventually break the damage can be so catastrphic you destroy your whole car. Say you put alot of mods on your car and some of those got damaged as well the dealer is not obligated to do anything for you for those mods, they only have to replace what needs to be replace or give you a new car, but the extras you put on they are not liable for... yeah you could complain long enough, go to court and so on and eventually they would prob have to take care of it, but is it really worth it? Nope....
Those that feel EVGA should give them a new board, yeah they could do it, are they going to? Who knows... But you know about the issue now, you know the risk from what I went though, what other members have gone though on the forums, what other people with other early gen x58 boards from other vendors. Its just up to you at this point on what to do. Be thankful you know now instead of later at least now you have the opportunity to take action before anything happens.
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My Little rant on the subject and why this post is now here Last week my 759 bit the dust in molten plastic and smoke, Though the week had green screens, dissapearing ram, the works.. I was gaming then poof system shut down, so I was like oh no let me back up my work fast and going to let this sit for a bit. .Powered it back on had my backup/workdrives in started backing up my work, all of a sudden smoke and the smell of burnt palstic filled my room... taking my machine apart when I pulled out the 24pin i saw the melted pins. Then did reasearch on it and many people not just me had the same exact thing happen, from psu's going down to the 24pin 12v pins melting, then someone posted the molex mod.... All in all I lost work, 3x psu's, 3x hard drives, ram, a rare dvd/cd drive just for my case that could not be replaced since hp/voodoo BB 002's got taken off the market.
EVGA gave me a Classified 3 to replace my 759 Limited Edition in a sense its a downgrade and an upgrade but the most important part of my 759 was the nf200 chip its why I purchased the board in the first place. It does not make up for what I have lost but a good gesture none the less. Just wish instead of saving 5-50 cents per board on putting on a molex it would had been put on the first go around when power hungry gpus where causing this.
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Computer setups with/without issues w/ the 24pin burning up this will be here to help narrow it down... its ben like over a week and still no official word so i guess we can do our own homework... Put everything in for your system i mean everything even if its a coffee maker... or a tiny itty bitty led anything and everything that uses power/is plugged up that is powered by your motherboard plugged in directly from us, sata, ide whatever to fans, lights, everything litterally.
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Possible Configurations of systems -----------------------------------------------------
1. Name:Donta1979
DATE on system: 4/2010 first GTX 480 7/2010 Second GTX 480 Promblems started Pin burnout on 6/7 OCT 2010
X58 759 Classified Limited Edition 551/770 Classified 3
"hot pins without molex, molex plugged in 12v pins stay cool" Core I7 980x
12gigs of ram
killer 2100
2x GTX 480's
3x 120mm fans
1x ram cooler
1x 40mm fan
Razor usb keyboard w/usb ports and usb mouse both with red glowing leds
Display's usb ports
nvidia 3d vision
nvidia 3d vision glasses charger cord
razer megalodon headset
360 controller
wacom tablet
1x blu Ray Drive
1x DVD/CD burner
5x to 7x hard drives at a time
Multi card/reader built into case like every memory card imaginable...
On the psu not connected to mobo
1x 120mm red led fan
2x Red cold Cathoids,
1x 12" Red LED Light
5x hard drive and LED on case pcb for hot swap of hard drives. connected to mobo though SATA cables.
CPU PUMP/block for self contained unit
PSU's I have gone though
Thermaltake Thoughpower 1000w Burned out had unstable voltages before it died causing major instability
Corsair 1000hx Burned out had unstable voltages before it died causing major instability
Antec TPQ 1200w "the one the 12v 24 pins burned kept chugging but unstable low dropping voltages causing major instability
Now running a Silverstone Strider 1200w not the best psu but no issues as of yet and voltages dont really drop. On a Classified 3 w/molex plugged in, without molex plugged in voltages drop way too much.
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Systems Without any Issues -----------------------------------------------------
1. Name: sgtharry
DATE on system: mobo 5/10/2009, and the 480's from 6/10/2010
EVGA X58 7?? Classified
On the psu not connected to mobo : 2 Water pumps
10,120 Fans
Into the motherboard: 3, 480's
1, 980X
6 Gigs memory
1 dual fan memory cooler
3, 50mm fans
2, ssd's
1, DVD Rom
1, Nic card
1, usb keyboard has keys that are blue lights
1,usb mouse
1,usb printer
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2. ---
post edited by donta1979 - 2010/10/26 21:40:04