Some of the causes for Unknown Device error are: The hardware does not have the requisite software drivers, andWindows is not able to determine the device ATI Radeon X1300XTX1600ProX1650 Series Secondary The driver is not compatible with the OS and hence it is not ableto inform Windows about the hardware. Each hardware component should normally communicate a basic device ID to Windows. Radeon X1300XT/X1600Pro/X1650 Series Secondary PowerColor Radeon X? Radeon X Series? VisionTek Radeon X? Palit Radeon X? Palit Radeon[…]