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Why is my new graphics card causing my computer to reboot?

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Why is my new graphics card causing my computer to reboot?

wowgoat270
Put a GT520 in an ASUS desktop. My power supply is 50w higher than what they said the minimum was (which was 300, and I have a 350) I suspect that might be the problem though because when I plug it back into the intergrated graphics it works just fine. Any ideas from anyone else? or do I just need to upgrade my power spply
Clarifications Clarifications
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Charles Bundy
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Every so often I have problems with bus parity causing reboots when I add a peripheral card (GPU, 1394, et-al) and have to turn PCI SEER off. Check your BIOS, turn that sucker off and all should be well.

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rahulpee
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This worked for me, many thanks.

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Slayer_
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Every time I have blown up a video card, the computer would restart randomly and each time, the machine would run less time until it wouldn't boot at all.
I have had 2 cards so far that were dead on arrival and had to be exchanged.

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Quaint_Data
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By the sounds of it your question really doesnt have a single simple answer, there seems to be numerous problems and all entirely in different directions as to why you are having these rebooting and dead video cards issues.
Rebooting is often caused by bad drivers or over heating.
If your system reboots fully back into windows heat the probable cause.
Slowing windows again runs into a few areas.
If you get a BSOD then it could be a bad driver or a mismatch / hardware incompatibility somewhere or a failing hardware component.

To start with how you insert a video card/s may cause a short or discharge off your body,
that in turn may have caused a problem on your motherboard
If there is swollen capacitors on the mobo >check with a torch> then your system is definately dying and the more load > Games and stuff increases it.
if there is large amounts of dust inside the case or on the fans heatsink etc.that will cause heat.
there could be dust inside the dimms where you insert the video card, possible cause of damage dead video cards
not enough power to provide a balanced system will shorten the life of your hard drive/processor.
Under these circumstances I would recomend to you to take the system to a professional and have it thoroughly tested and checked.
If it is againg may even be the hard drive itself.
Around 3 years of age it requires a major maintinence and cleanup if never performed,
more than 3 years of age I'd start looking into all the hardware, and outdated drivers.
New hard drives can come cheap so don't measure up for performance.
They need defragging.
How old is your system?

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Quaint_Data
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Half my top post dissappeared, must have exceeded
As I started to say, there seems to be no single answer here, I feel your problem may be in too many directions.
Rebooting fully back into windows possibly Heat.
No BSOD?
The method you insert your video card may have caused a discharge /short,
check the capacitors on your motherboard>swollen, use a torch, if there is your system is dying. if this is the problem every time you do stuff heavy with graphics will cause load / stress.

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Quaint_Data
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This sucks most of my comments just dont go through???

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HDSTUDIO
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I realize I'm answering to old post here, but in case anyone else finds this page and my comment could help, I had a lot of troubleshooting in regards to Win Vista installing and running in regards to this issue. My system would auto-reboot or crash dump every 5 to 15 minutes. I went through just about every possible scenario, including bad RAM, bad HD, bad power supply, etc. After swapping each of those around with others I had in another system and still having the issue, I decided to read a little bit of the blue screen of death to pick up on any clues. It suggested that the video card might be bad. Since I was using the integrated video card on my Asus motherboard, I thought I'd see if it was a video driver issue. So, I installed Ubuntu on the same exact hardware to see if it did the same thing. If it did, it would be a hardware failure, if not, it would be a software. Ubuntu ran flawlessly with no crashes. SO, moral of the story, if you are having automatic rebooting and and blue screens every 15 minutes or so, it's most likely coming from poor communication between the OS and the video card. Update the driver, the OS, or, if you can, switch from MS **** to a new Linux distro and enjoy your computer again...lol. Hope this helps someone.