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Pci express x16 problem

Last response: in Graphics & Displays
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January 2, 2012 4:01:16 AM

ok i have a (powerColor) Radeon HD 5450 put into my pci express slot on my desktop and it wont start up. this desktop is a acer aspire t180 from 2007.

specs are here

i dont have a spare graphics card to check on it. i heard it could be registry but i dont know the first thing to do with it. But i think it is more then that because the graphics card can be slid in and out of the slot without unclamping it. I have tried to push it in more and it wont work. this card does not need external power. (but does that mean it does not need a bigger power supply?)
January 2, 2012 4:11:11 AM

yup, your current power supply is only 250 watts, the 5450 requires a minimum power supply of 400 watts.
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