First of all i already tested the graphic card on another computer, also i even tested my PCI slot with a different type of graphic card that does not need external power (and it works) however, when i attached my new graphic card, Sapphire ATI Radeon HD 5850 Extreme 1024MB GDDR5 PCI-Express for some reason the pc does not recognise it and the pc switch on from the onboard graphic card. İ also tried to disable the graphic card from the bios but all in vain
Computer specifications: Windows 7 Motherboard – Wolfdale 1333 – D667
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