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E760 Classified Mobo + SLI GTX 480s = melted 24 pin connectors

post #1 of 58
Thread Starter 
This is a word of warning to you guys out there using this motherboard and more than one GTX 480. I've used two different PSU's, a tagan 800W unit and 1200W Silverstone unit. Both PSU's 24pin connector had two pins melt into the socket of the mobo.

This is ostensibly due to the MoBo simply trying to pull too much current through a single pin (one pin was the + and the other was the ground) and overheating it to the point of melting it. There is no short in this system. It only happens when under 3d mode and when running in SLI. When only one GPU is pulling power, this does not occur.

I personally find this to be a HUGE engineering failure on both nVidia's and eVGA's behalf. nVidia has made a card that pulls too much power through the motherboard, and eVGA has failed to design a $400+ motherboard capable of handling a mere two of the most elite of GPUs. I also ran a tri-fire 5970+5870 set up on this very board and it did NOT do this.

The guy's over at XS have seen this happen to this board in 4 x 4890 configurations as well. They have a mod to fix it that involves soldering another 12v lead and ground to the back of the 24-pin soldering points

You've been warned.

Silverstone



Tagan

LL
LL
LL
Edited by Ihatethedukes - 7/6/10 at 9:21pm
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post #2 of 58
Woah... would have maybe expected this to happen to an MSI board, but a Classy? O_o
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post #3 of 58
I wonder if this is the same model as the one that NCSpec had from evga where the 24 pin mobo connector melted as well. Just don't dremel it off.
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post #4 of 58
Thread Starter 
I'm pretty sure it is. I'm gonna rage (politely) to eVGA tomorrow. Adding pics now.
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post #5 of 58
oh no!!
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post #6 of 58
You're not going to blame the PSU manufacturer for allowing that much current to be pulled through the line?

There's no corrosion or anything on the pins?
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post #7 of 58
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
You're not going to blame the PSU manufacturer for allowing that much current to be pulled through the line?

There's no corrosion or anything on the pins?
Nope. They cannot regulate per wire power draw like that. (Not without $400 PSU's) motherboard and gpu manufacturers CAN as they unilaterally can have the unit in question pull power primarily from whatever source that they have available. Hell that's their JOBS, to create a board that handles extremely high power GPUs and CPUs. eVGA forked this one up bad. nVidia did too, but indirectly.

EDIT: as for the corrosion, no, there is none, outside of the molten plastic that now coats them. Keep in mind two different PSUs did this.
Edited by Ihatethedukes - 7/6/10 at 9:19pm
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post #8 of 58
Quote:
Originally Posted by DuckieHo View Post
You're not going to blame the PSU manufacturer for allowing that much current to be pulled through the line?

There's no corrosion or anything on the pins?
I was thinking the same thing, I thought he meant the connector on the motherboard. Regardless of how much current a motherboard pulls, the PSU sure as hell better be designed to provide it, or shut itself down to protect itself.

If the plastic around those two male pins melted, and the two female pins that they go into are perfectly fine, its the PSU.
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post #9 of 58
Thread Starter 
Quote:
Originally Posted by joemaniaci View Post
I was thinking the same thing, I thought he meant the connector on the motherboard. Regardless of how much current a motherboard pulls, the PSU sure as hell better be designed to provide it, or shut itself down to protect itself.
PSUs are designed against surges and shorts, not motherboards pulling too many amps through a connector that isn't designed for it. It's a design flaw of the mobo and gfx.
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post #10 of 58
im calling User fail. Tagan???
    
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