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burned resistors EVGA GTX 1080 FTW please help can i make

which are resistors as much as ohms

  • thank you in advance

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20201103_153824.jpg
senseA.jpg
1080-37b.jpg
 
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Looks like someone took a soldering iron to it for a few hours. Card may be toast, sorry I cannot help more but that is some carnage.
 
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"LB" marking, so it might be ferrite beads instead of resistors.

As with anything vaporizing in an electronic circuit, best to figure out what was happened that caused them to burn in the first place before talking about repair. Burning resistor/inductor is often just a symptom instead of a problem.
 
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Those four look like small inductors or just bridges (no resistance) used instead of that L21 larger coil and either one has soldered over them to make them more "conductive"/bridged them or there was a lot of current running through them so they melted. That circuit looks like fan control - perhaps fan malfunctioned and got shorted somehow?
 
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Those four look like small inductors or just bridges (no resistance) used instead of that L21 larger coil and either one has soldered over them to make them more "conductive"/bridged them or there was a lot of current running through them so they melted. That circuit looks like fan control - perhaps fan malfunctioned and got shorted somehow?

From the proximity to the header it might be the case. But the trace width, sense resistor size, and the amount of via stitching give the impression that it is used for something much more beefy than just a fan. Why would a fan supply stitched into internal layer anyway? It's also in close proximity to the VRM for GDDR5X's 1V8 Vpp (located directly on top of this section).

FWIW I'm also not sure which way the current flows. If it is "just" some VRM input EMI compliance ferrite bead, you might be fine just shorting them. Tho there's some wacky VRM design that use it inside the sense loop.
 
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I didn't connect the right 8 pin connector well and there was a small spark and I smelled something burning and when I opened it happened

that's why she caught fire she had no other problem with the word of this

i need to buy these resistors but i can't find anywhere what the values are in Ω
 
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Yeah, those connectors need to "click" and plug all the way in. You probably burned something in the power delivery awfully.

Time for a new card, I say.
 
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I believe that's part of the power sensing circuit, and those where certainly inductors but I have no idea what value they would be.
As long as nothing else got damaged it might be repairable but it really depends on how badly the pcb is burnt.
 
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The 1060 - 1070 - 1080 FTW and SC series cards have a history of pyrotechnics and when I read the thread title, I thot that was the problem

Given the location of your card's failure and your description of how / when it occured, I would say yours would not fall into this category
 
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Damn, i destroyed mine, if i hadn't lobbed it out i could have sent you it, it would have had bits to repair yours on it.
 

pceslayer

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Did you ever figure out the part number of the ferrite beads(inductors) that got destroyed? I am attempting a similar repair on a 1070...

The failure on my card is due to the mosfet for the VRM overheating and shorting out taking a inductor (R33) and the 4 beads and who knows what else with it.
 

BigDwagon

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Did you ever figure out the part number of the ferrite beads(inductors) that got destroyed? I am attempting a similar repair on a 1070...

The failure on my card is due to the mosfet for the VRM overheating and shorting out taking a inductor (R33) and the 4 beads and who knows what else with it.

I have the same issue on two 1080 Hybrids. The 4 components at the bottom, plus the Inductor R33 were damaged as well as capacitor C2943 leaking. I'm trying to find specs for what components to get to replace these (there was no damage to the contact pads) but I can't find any helpful info on what I need to replace these with
 
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