Download CPU-Z or HWInfo and look at the "Mainboard" or "Chipset" tab. If it says Intel G31/G33/P35 , you likely have GMA 3100 graphics.
Go directly to: downloadcenter.intel.com/product/... (search for "Intel Graphics Media Accelerator 3100").
. For this system to display video, graphics are handled by either a chipset on the motherboard or a dedicated (discrete) video card. TechPowerUp How to Find the Correct Driver


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