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GTX 285's SLi (Power Cut)

post #1 of 19
Thread Starter 
Hey Guys,

Its been some time since i've frequented the site, but i knew you guys would be the best to ask.

Situation: My house is fairly old and I use a lot of electrical equipment around the house, when using the kettle, microwave and electric oven it trips all the power sockets in the house, tripping the breaker, this obviously turns off everything plugged into a wall... so pretty much every computer / tv / router ect...

This has happens many times and has never really had any negative effect on my components (apart from it not being good) And on the weekend when cooking it happend again, and i flipped the breaker and it all came back on,

When restarting my computer which had been switched off by the subsequent power loss, only one screen was receiving signal, this concerned me somewhat.

After booting up and loading device manager only one card was recognized!

Now this has happened in the past when updating drivers and such (or when re-routing the water loops) but it has always re-found it....

My question is, do you think that the sudden power cut caused by the breakers could have caused the card to fry? or to malfunction? i've changed the power cables to the cards (same PSU) to see if that made a difference and from what i can tell both cards feel the same temperature as if they are both getting power.... but still only one is displaying in device manager.

If this has caused it to fry / break (i've watercooled them so warranty is out the question) i'm going to speak to my landlord and try and get an explanation or renumeration for the shoddy electrics...

All system info in in my sig rig.

Cheers in advance guys.
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post #2 of 19
those cards have 6 inductors going from the power supply to the gpu. I suspect you blew one of them
    
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post #3 of 19
Quote:
Originally Posted by OutOfBalanceOX View Post
those cards have 6 inductors going from the power supply to the gpu. I suspect you blew one of them
^this. Plugged directly into the wall?
post #4 of 19
Thread Starter 
Quote:
Originally Posted by OutOfBalanceOX View Post
those cards have 6 inductors going from the power supply to the gpu. I suspect you blew one of them
Inductors? (as far as my knowledge goes) If they were to go they would pop? smoke or be noticeable on the card itself?

There appears to be no damage / residue / smell or indication any of the smaller components have been damaged, from feeling the back of the pcb both cards are getting power as i can feel the heat...

If i've ninja popped the chokes i guess it would be a mission to replace and re-solder them?
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post #5 of 19
Quote:
Originally Posted by ChosenLord View Post
Inductors? (as far as my knowledge goes) If they were to go they would pop? smoke or be noticeable on the card itself?

There appears to be no damage / residue / smell or indication any of the smaller components have been damaged, from feeling the back of the pcb both cards are getting power as i can feel the heat...

If i've ninja popped the chokes i guess it would be a mission to replace and re-solder them?
generally you would be right but the only way to tell would be to look at the boards components for discoloration.

if it is one of the inductors digikey sells them (thats where I got mine)
    
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post #6 of 19
Thread Starter 
Quote:
Originally Posted by OutOfBalanceOX View Post
generally you would be right but the only way to tell would be to look at the boards components for discoloration.

if it is one of the inductors digikey sells them (thats where I got mine)
Hmm, well i'm reluctant to take the whole card out, as it would involve draining my system ect... but i'll have a good photo session tonight and look for any unusual markings, however with a full water block on them i'm not sure if i'll see the damage, hopefully it will show up on the backside of the pcb...

I'm really hoping its just a bust PSU 6+2 pin arm... i've got a few spare on my psu to test...
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post #7 of 19
Quote:
Originally Posted by ChosenLord View Post
Hmm, well i'm reluctant to take the whole card out, as it would involve draining my system ect... but i'll have a good photo session tonight and look for any unusual markings, however with a full water block on them i'm not sure if i'll see the damage, hopefully it will show up on the backside of the pcb...

I'm really hoping its just a bust PSU 6+2 pin arm... i've got a few spare on my psu to test...
nah youll need to remove WB's to check as itll cover all of the bad stuff
    
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post #8 of 19
You can test the PSU's PCIE connectors with a multimeter and check if there is power output.
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post #9 of 19
Thread Starter 
Quote:
Originally Posted by Voltage_Drop View Post
You can test the PSU's PCIE connectors with a multimeter and check if there is power output.
I don't have a Multimeter, but i've swapped the pci-e power arms to see if affects the other gpu, but all i got was the same, which leads me to suspect there is something up with the card, i'm just not convinced that a sudden loss in power could have caused any component to fail, i could understand if it was a power surge...
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post #10 of 19
Quote:
Originally Posted by ChosenLord View Post
I don't have a Multimeter, but i've swapped the pci-e power arms to see if affects the other gpu, but all i got was the same, which leads me to suspect there is something up with the card, i'm just not convinced that a sudden loss in power could have caused any component to fail, i could understand if it was a power surge...
sudden loss of power can kill components, most often when under load.
The reason I suspected the inductors is that they go to negative voltage when power is cut (which could also kill other chips down the line)
    
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