GPU behaving strangely

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krish14

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I have a Geforce GTX 550 Ti that my friend borrowed for a month. After I got the card back it stopped working in both of my systems, but works fine in his.
The card is not detected by any of my motherboards, but my new GTX 650 Ti Boost works absolutely fine on them.

His system has a B75 chipset with a Core i5 3450

My built
Core 2 Extreme QX9770 with a 790i Ultra Sli
The second is G41 chipset with Q6600

Any ideas as to what the problem may be??
 
Solution
jerreece
Have you seen the 550 Ti work in his system personally? Or just taking your friend's word for it? Doesn't make much sense that it would not work in either of your rigs, but supposedly works in his.

And you know your rigs work as you have the 650 Ti to test them with.
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jerreece

jerreece

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Have you seen the 550 Ti work in his system personally? Or just taking your friend's word for it? Doesn't make much sense that it would not work in either of your rigs, but supposedly works in his.

And you know your rigs work as you have the 650 Ti to test them with.
 
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krish14

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I saw it personally.
After I got it back and it failed to work went back to his place to check, and it worked fine.
Ran Guild Wars for about half an hour without artifacts or any other issues.
 
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jerreece

jerreece

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Hmmm.

Make sure integrated graphics are disabled in your system BIOS before you try the card. See if that makes a difference.

You mentioned the motherboards don't detect the card. If you hook up to the video card does your monitor detect it? Or does it say no signal (or turn itself off)? And will your computer screen show the POST process as the motherboard boots up?
 
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krish14

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One the 790i there's no integrated graphics.
On the G41 it switches automatically. but installing this card disables the onboard graphics too.

The monitors don't turn on at all.

 
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jerreece

jerreece

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Everything would point to the video card being completely dead. However, both your motherboards are fairly older models. The 790i is a PCI-Express 2.0 board which should work with most newer 3.0 cards. However, the G41 chipset uses PCI-Express 1.1 so I could see that one having conflict potentially.

Backwards compatibility is not always perfect. Did this video card ever work on your two systems in the past? Since it works on your friend's system I can't see why it wouldn't work on yours unless it is simply not compatible with the PCI-Express slots.
 
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krish14

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It worked on my 790i for about 18 months.
and on both of my boards my old 8800 Ultra and the 650 Ti Boost work perfectly.
I wonder if I can get it replaced for this reason.

Sorry for a late reply.
 
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krish14

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I tried reflashing the BIOS. Updated it. Tried random stuff with NiBiTor. Nothing worked.
Took it to the service center, and the guys there promised to help. so lets see what happens.

 
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