Its an OEM product that was made only for OEMs. Its not an AMD Product its an OEM product made by AMD for HP.
Had HP of actually gone with a 7770M or the like you would have gotten AMD driver support because thats an official AMD mobility card. (it also would have cost more)
Its no different then when asus makes OEM boards for HP. Asus doesn't support them, nor do they have any related information for those boards. Its up to HP to support them.
With that being said the card is also a rebranded 6770M so you may be able use the amd modded mobility drivers (non official you can google them)
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