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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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KMoore4318
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/13 18:08:22 (permalink)
The melting is caused by excesive heat, the heat is caused by two much curent passing through a weak point in the circuit, adding the mod allows the curent to pass by the conector, and effectavley acts like a larger pipe, annolagy, if you want to push watter through a hose, the amount of watter you can push is limited by the size of the hose, and the presure of the watter. incresing the presure increses heat, due to resistance. adding the mod allows more to pass, at lower presure, and because of the location of the connection, bypass the connector. and as stated above as long as you can return the board to like stock condition, who would know you ever did the mod. you would want to avoid physical damage, ( so I do not recomend the hot glue, note the sauder joints do not have glue on them now. ) and they function. your board has many exposed sauder joints, but they are seperated from grounding thanks to the stand off's.  If you still feel uncomftorable with exposed sauder joints, a good quality electrical tape would be easy to remove,

  
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/13 18:09:17 (permalink)
trilogy3337

Not if you add the voltage on the backside of the weakspot. The weakest link in the circuit is the 24pin connection itself, hence why you add the molex to the board directly and thus bypass the 24pin connector.

On a side note, I wonder if this is even a possibility to those that are in dual PSU setup's. 


mobo makers and psu makers could always beef up thier 24 pins  both in delivery of power psu to mob, the connection/transfer of power  meaning the 24 pin, thicker heavy duty pins and mounting system both on the mobo and psu. but that would require a whole new standard... and line of mobos once again to get rid of the molex. Not very cost effective since the market running high end multiple high power consumption gpus is actually a smaller market.

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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/13 18:10:18 (permalink)
I have a question for you guys, especially those running E759 boards and BIOS 74.  Did you notice that the E-LEET readout for CPU VTT at load is always about 0.05V-0.07V higher than the value set in the BIOS?  I just want to make sure it is not just my board that is doing this.
 
I'm testing what I can while I have the Classified 3 here in case that I really need to RMA my E759 after this burn out ordeal so I want to check everything.
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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/13 18:15:49 (permalink)
dejanh

I have a question for you guys, especially those running E759 boards and BIOS 74.  Did you notice that the E-LEET readout for CPU VTT at load is always about 0.05V-0.07V higher than the value set in the BIOS?  I just want to make sure it is not just my board that is doing this.

I'm testing what I can while I have the Classified 3 here in case that I really need to RMA my E759 after this burn out ordeal so I want to check everything.


hmmm, mine is actually lower in Eleet, Dejanh.

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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/13 18:18:05 (permalink)
firerx

dejanh

I have a question for you guys, especially those running E759 boards and BIOS 74.  Did you notice that the E-LEET readout for CPU VTT at load is always about 0.05V-0.07V higher than the value set in the BIOS?  I just want to make sure it is not just my board that is doing this.

I'm testing what I can while I have the Classified 3 here in case that I really need to RMA my E759 after this burn out ordeal so I want to check everything.


hmmm, mine is actually lower in Eleet, Dejanh.

Not sure if I remember that but my ram voltage is like .5 higher than what i set it to, I had to set my ram at 1.6v so it would run at 1.65v.
 
As for the readings yes with that psu things where always lower than what they where set to in bios for the cpu etc, under load my voltages would drop. I asked about this on the forums and was told by other members with the Antec TPQ 1200w this was normal... But not too long afterwards as voltages dropped a bit more is when I started having issues.  Same with my other psu's this happened right as they where about to fail at least they just failed and stopped working.
post edited by donta1979 - 2010/10/13 18:32:39

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Re:EVGA X58 759/760 Classified 24 pin mobo/psu burning up Defect With High Power GPU's 2010/10/13 20:04:09 (permalink)
Hello dejanh
 
Not really panic but will be bad if I loose several components and yes we should wait till evga comes with something, I always liked evga products, reason I have the 5870 was because gtx 480s were not out at the time I build my computer.
 
Like always evga communuty is the best FTW.
 

 
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 20:06:58 (permalink)
dejanh

 
recon 7185
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I find it strikingly odd that an Antec rep would post in this thread as Antec has been a very strong proponent of the multi rail psu design.

My posting here has nothing to do with the design of our power supplies. My presence here is to simply provide assistance where possible and to gather information that might help us help you (insert Jerry Maguire here). 

I do have a question concerning the antec TPQ 1200. My northbridge on the x58 LE shorted out and the tpq 1200 kept going and did no shut itself off. Donta said that his other 2 PSU's died and the TPQ 1200 kept going and thats when I assume the pins melted. Is there not a specific safety feature on the TPQ that would protect hardware? Every other case where I have had a short or something out of the ordinary my PSU would shut off. Not bashing at all, in fact I love antec's stuff, just want to check before I get a new SLI approved PSU prefferably from antec


From what you are describing your board shorted out, not your PSU.  In that case PSU may or may not keep running depending on how bad the damage to your board is actually.  donta1979 case, my case, and others, had no issue with the board shorting out first.  It was the PSU that melted then took other stuff with it.  This aside, and not to be rude or anything, but questions unrelated to the problem at hand here should probably be put in its own thread.


My point in asking was to speculate whether or not that particular PSU shuts off under the correct conditions, such as a short in my case or melting the 24pin connector thus taking out hardware. I offered my experience as a way to try to see if the PSU in question does not protect other hardware under certain conditions like a melting 24pin. Anyways, sorry you thought i was trying to get off topic but i am trying to understand why the psu would not shut off, but then again i am not an expert

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 21:15:32 (permalink)
PSU shuts off when it senses that there is too much current flowing through it.  For example a short circuit, or a power surge, will cause the Over Current Protection (OCP) to trip.  If a component on your board goes that does not necessarily mean that the PSU will shut down.  It is possible, but not generally the case.
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 21:31:11 (permalink)
dejanh

PSU shuts off when it senses that there is too much current flowing through it.  For example a short circuit, or a power surge, will cause the Over Current Protection (OCP) to trip.  If a component on your board goes that does not necessarily mean that the PSU will shut down.  It is possible, but not generally the case.


Got it. All i know is that this problem is making me hold off on another TPQ 1200 and 480 until this is figured out. I was advised not to do the molex mod, and since I just got the SLI3 I am not really in the market for another mobo unless i could step up to the classified 3 and that is not an option

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 21:35:18 (permalink)
I would get the Silverstone Zeus 1200w personally not sure about the corsair 1200ax if voltages drop or the pc power and cooling 1200w.. better for cable management, voltages dont drop like they do on the antec tpq 1200w like your 3.3v 3v, 12v 5v and so on.
post edited by donta1979 - 2010/10/13 21:37:48

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 21:44:11 (permalink)
donta1979

I would get the Silverstone Zeus 1200w personally not sure about the corsair 1200ax if voltages drop or the pc power and cooling 1200w.. better for cable management, voltages dont drop like they do on the antec tpq 1200w like your 3.3v 3v, 12v 5v and so on.


when you say they drop do you mean under load or over time?

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 21:45:49 (permalink)
recon 7185

donta1979

I would get the Silverstone Zeus 1200w personally not sure about the corsair 1200ax if voltages drop or the pc power and cooling 1200w.. better for cable management, voltages dont drop like they do on the antec tpq 1200w like your 3.3v 3v, 12v 5v and so on.


when you say they drop do you mean under load or over time?

under load I was worried about it and asked on the forums and other members said it was fine and normal with the antec tpq 1200, but tbh voltages in my opinion should not drop like that.
 
Also I would do the mod or pay someone that knows what they are doing to do it for you just to be on the safe side, there is no guantee it will happen to you, but when it does happen it really blows...
post edited by donta1979 - 2010/10/13 21:48:31

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 21:48:42 (permalink)
donta1979

recon 7185

donta1979

I would get the Silverstone Zeus 1200w personally not sure about the corsair 1200ax if voltages drop or the pc power and cooling 1200w.. better for cable management, voltages dont drop like they do on the antec tpq 1200w like your 3.3v 3v, 12v 5v and so on.


when you say they drop do you mean under load or over time?

under load I was worried about it and asked on the forums and other members said it was fine and normal with the antec tpq 1200, but tbh voltages in my opinion should not drop like that.


Thanks for the advice. What about the silverstone strider 1500w? I ask because it is in stock at my local store

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 21:51:33 (permalink)
I dont know much about that psu, members here on the forums seem to like it but I know the zeus's are as close to perfect as your going to get since they are all machine/robotic made. Thermaltake is also coming out with like a 1300 something watt psu as well, think its already up for sale.
here it is
http://www.newegg.com/Product/Product.aspx?Item=N82E16817153134
post edited by donta1979 - 2010/10/13 21:55:18

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 21:58:31 (permalink)
I am running on a 875w Thermaltake right now. Can't complain. I guess I will have to read some reviews... Can I PM you if I have more questions to keep the thread on topic ? I was thinking and maybe this was mentioned before but would an adapter that would include a molex going between the male and female parts of the 24pin work? Or does the problem persist with overloading those points on the 24 pin?

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 22:06:40 (permalink)
from my first post and the post on xtremesystems for the mod, what is happening with GTX 480's with some type of hardware setup is the psu is pumping alot of power though the 24 pin on the 12v pins, there is resistance it cannot push the power being asked for on those two pins so they heat up melting plastic and even scorching the 24pin's 12v. What the molex mod does is supplys the extra power the motherboard/gpus is asking for thus not as much power is being pushed though the 2x 12v pins on the 24 pin, thus lowering its load. So the mass resistance is not happening and you do not have a meltdown, and the psu being overstressed by trying to pump so much power though though the 2x 12v pins on the 24pin letting it go back down to regular power distrubution and not possibly burning out the power supply.
 
As for the adapter on the 24pin no that would not work because you would once again be dealing with resistance of that 24pin with a molex plugged in those 12v pins/lines. They are designed to only push out so much power though so you would be once again dealing with hot 24 pins still the psu itself would prob be safe but for the 24 pin 12v pins no prob not. Yes you can pm me.
Also there may or may not be psu vendors out there that make a beefier 24 pin for thier psu's  as for what brands I am not sure and if they can really handle the increased voltage being pumped though I am unsure of that as well.
post edited by donta1979 - 2010/10/13 23:16:07

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/13 22:58:00 (permalink)
i read this thread lastnite from page one was realy good reading minus a few bits that spoilt it.can i call this dontas inferno.?thanx donta for the heads up on what may happin to my rig i think i will lay off oc for a while maybe put a probe on my 24 min keep an eye on it cheers

 
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 01:34:33 (permalink)
5thduke

can i call this dontas inferno?

 
ROTFL!!!  I was thinking the same thing a few days ago and it fits.  Quite a coincidence since I've been reading Donte's journey on my Kindle.  I was forced to read it many years ago in college and this post made me laugh so hard I had tears in my eyes.  Thanks for that 5th!
 
Sorry this is off topic, but I just had to post it.
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 05:28:38 (permalink)
I find it rather ironic that DFI, which is out of the enthusiast mobo market, had the foresight to add additional PCI-E power connectors (FDD style) to its boards for years...

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 08:51:36 (permalink)
Sabishii Hito

I find it rather ironic that DFI, which is out of the enthusiast mobo market, had the foresight to add additional PCI-E power connectors (FDD style) to its boards for years...


It comes down to management that is what will ruin a company no matter how good of a product it makes.

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 09:59:30 (permalink)
Well i'm worried about this problem since i'll have Tri SLI 480GTX cards on my 760 MB.  Still in the process of buying the final parts for the water cooling and now i read this.
 
So, 8 days left on my step up and dont see the new board as an option for step up.. Do i just mod the board and see what happends? Or.. buy a new Class 3 for $365 or grab a 4 way 762 and a new EK full block?? The last option would cost me $380 for the board before rebate and another $140 for the new WB for a total of around $576 after overnight shipping.
I'd go for it but ofcourse i cant find another Galaxy 480GTX and DD all nickle MB for the 4th card to match the other 3. :( There now selling a SC version thats all blue! :(
I guess freakin mod the thing.. but boy its gona be fun to find a spot to plug it in.

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 10:05:47 (permalink)
Damn dont see a edit button..
 
Just wanted to add that i'm thrilled to be building a dream (no tomorrow) build for prob the first and last time in my life and in the end i cant be completely happy with it as there will always be this feeling of Rushin Roulette when using it.
 
My luck the thing will melt and take everything with it..
Wifes freakin yeling at me cause i've spent so much money on it and it could possably burn the Condo complex down to the ground killing my family with my 5 year old daughter and 18 month year old son.
 
So thats what i risk using this setup.. nice.

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 10:26:47 (permalink)
Yes that really sucks.
In the same boat too and just got sunk.
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 10:27:22 (permalink)
AHowes, I feel your pain and I love EVGA but I say it's not worth the risk! get rid of the 760 you'll sleep better..
 
I already tore down my E759 and boxed it, I'm probably going to get another brand besides EVGA this time around probably gpu's too..


 


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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 10:39:11 (permalink)
Just do the mod or get a 770 or a 4 way. It takes some kind of setup to make it happen. If you have a 759 I would do the mod if you have a  760 and can stepup do that. If you cannot afford to get a 770 with a 760 do the mod.  It wont always happen "have to have the right setup for it" but when it does happen it sucks. But yeah i have to agree doing the mod yourself you should not have to do that kind of thing, it should had been fine out of the box....
post edited by donta1979 - 2010/10/14 10:41:34

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 10:41:32 (permalink)
BDW_88

AHowes, I feel your pain and I love EVGA but I say it's not worth the risk! get rid of the 760 you'll sleep better..

I already tore down my E759 and boxed it, I'm probably going to get another brand besides EVGA this time around probably gpu's too..


Time for another EVGA official announcement...Oh wait, did we have one yet?  Oh yeah, they're working on it.
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 11:20:21 (permalink)
Welp, i guess that last talk with the wife settles the matter for me. Mod the board as blowing that much more to fix the problem with buying a new MB and another full MB water block would be nuts. I guess another $2-300 in the end after selling this one and after the rebate is worth more then all the money i got in this new system and risking the lifes of my family and everyone else in this condo complex.
 

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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 11:47:23 (permalink)
I myself will be getting another BM the E770 this weekend and
wait to see what evga is going to do.
Then the E760 will ether be upgrade or up for sale.
we shall see.
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 12:22:01 (permalink)
Well, I have an update from my end, post Molex mod on the E759.
 
I have soldered on two +12V Molex connectors to the back of the board, one per each +12V pin of the 24-pin ATX connector.  I have tested the system for a few hours (approx. 4-6 hours total now) under LinX, Multi-GPU FurMark 1.8.2 Xtreme Burning Mode with Displacement mapping enabled, and also with both running simultaneously while overclocked (CPU at 4.21GHz, HD5850s at 1000/1250), and the voltage on the +12V rail seems more stable than before. 
 
Under LinX with all DRAM tested the drop is 0% (voltage stays steady at 12.04V).  When loading the CPU and GPUs fully voltage drops to 11.81V which is only 1.91% drop, perfectly acceptable.  Before the mod I was getting 1.25% drop on the +12V rail when under LinX all DRAM load only, and 2.90% drop when under LinX and FurMark load.  There definitely seems to be a positive impact of this mod on the stability.
 
I also noticed that the peak amperage reported by GPU-Z at 1.2875V for both HD5850 GPUs overclocked to 1000/1250 does not exceed approx. 60A.  Prior to the mod it would hit 75A+, even as high as 85A per GPU when running FurMark at 1920x1200 resolution with settings specified above.  The temperatures also dropped by about 3C-5C at load on the GPUs (my ambient temperatures are consistent to within 2C).
 
I am quite confident that this was a low voltage induced burnout because the pins simply could not supply enough to meet the demand of the CPU and GPUs at the same time.

The mod was dirt simple, and it is very clean.  You cannot see anything at all from the front.  Extra Molex connectors are nicely tucked away at the back of the board and hook up like fans and drives behind the motherboard tray of the case (between it and the back panel).
 
Edit: Just to illustrate, here is a quick run I started in the last few minutes.  Look at the load and the voltage on the +12V rail

post edited by dejanh - 2010/10/14 12:43:56
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Re:EVGA X58 759 Classifed Limited Edition #551 down... going to get an ASUS....=/ 2010/10/14 12:44:37 (permalink)
Good to hear.. Now did you feel the ATX connection to see if its hot at all?

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