Question about ASUS EN7800GTX GeForce 7800 GTX, (256 MB) Graphic Card

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Automatic Switching off of monitor

I've had the geforce 7800 GTX graphics card for near 2 years now, which has been operating inside a Dell Dimensions 5100 perfectly normally until recently.
I am aware that the power demands of the graphics card exceed the supply of the computer. However I gave it a go and it seemed to work.

2 years on my computer has started to behave strangely. Anywhere between 1-20 minutes, after booting up, the monitor switches off and the computer freezes - the monitor will not turn on again unless the power is switched off/on.

After removing the graphics card and running the graphics directly from the motherboard this problem doesn't occur.

Is there any solution that allows me to keep using the geforce? If it is power supply issues its strange that the the card worked without fault for 2 years.

Any guidance would be much appreciated


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Have you tried your card on another machine? One thing i have seen in several forums (though i have not come across it personally) is that if you run your VGA card with a PSU thats not powerful enough, the PSU may get busted but usually the graphic card due to being stressed running underpowered fails. Hence the reason why i inquired if you had tested your graphic card on another machine to see if the same symptoms occur.

If it does not happen you can then know its a problem related to the power supply, as the power supply capacitors too degrade over time, and hence they might not be giving the same power as before. Dell power supply units have been known to work well beyond there stated wattage compared to the generic systems (Some case dell 250W unit seems to run better than generic 400W units).

Posted on Dec 11, 2007


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Posted on Jan 02, 2017


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To get the full specs of your mainboard go to:

This motherboard has 1 PCI Express x16 slot for a graphics card.

You could use:
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Geforce 7 series (GeForce 7950, GeForce 7900, GeForce 7800, GeForce 7600 ,
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Geforce 8 series (GeForce 8800 Ultra, GeForce 8800 GTX, GeForce 8800 GTS, GeForce 8800 GTS 512, GeForce 8800 GT, GeForce 8800 GS, GeForce 8600 GTS, GeForce 8600 GT and GeForce 8500 GT)

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