The motherboard of my computer is integrated, and came with a video card already installed. I just bought a new video card (Nvidia GeForce 8400 GS). It SHOULD work. The video card is PCI, and so is my motherboard. But, when inserted, my computer completely shuts off and stops working until the card is removed.|||You're not trying to install the card WHILE the computer is ON are you?
You may need to change a setting in the Bios to allow for the new card. Otherwise it's likely that your power supply isn't sufficient or you have a faulty card/slot.|||Your power supply doesn't have enough wattage to power your card, get a better power supply|||If your PSU (Power Supply Unit) can't give enough to meet the card's demands, it will cause your computer to either:
A) Not start. This is the case for very low output PSUs (~200w)
B) Randomly shut off. This is the case for low-medium output PSU (~300w).
You often need at least 450w for a GeForce. Consult your manual about the card's power needs then adjust your PSU accordingly (IE: Go buy a new one). Make sure your new PSU has the proper power connectors for all of your current components.
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