GT650M not detected graphics dedicated the 7R 7720 SE

After upgrading the BIOS A14, the GT650 is gone from Device Manager:

If reinstalling the driver NVidia, the message no found hardware:

After restoring the system, double-click the NVidia Control Panel icon in the taskbar, there's still no GT650M found:

This thread is closed because I changed the motherboard of dell service. The laptop works fine now.

I wish I have more time to dig the answer on a technical level, but things are not always as expected. In any case, I checked again a lot of paper on intel i7 and PCH. It seems that by default the core i7 video card is the intel HD 4000 and the controller of the external video card is based on the internal. This should rely on the bios that no option exists in the computer dell laptop. I've heard some other laptops are able to set the bios to block the video card intel HD internal but I'm not sure.

For those who still suffers from this problem, I suggest that contact dell directly to see if there are alternatives. Instead of evil by yourself, dell will be more effective.

Tags: Dell Laptop

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