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AMD R9 M290x Not Detected

I recently bought an Alienware 17x with switchable graphics (Intel 4600 and AMD Radeon HD R9 M290x). It's been working like a charm until today, when it was suddenly unable to detect my AMD card. I've tried installing the newest drivers from both AMD and Dell - neither have worked. Many seem to have had similar problems when updating Windows 8.1, but I haven't updated Windows recently so I don't think that can be the cause. 

Any ideas?

EDIT: Solved not five minutes after posting this by updating the BIOS from the Dell driver and download site. 

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RE: AMD R9 M290x Not Detected

Great thanks’ for letting us know, if you face any other issue please come back to us. 

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