Apparently, HD 7670 OEM isn't the only product that couldn't survive the prying eyes of the media, there are more. AMD's lineup of HD 7000 series OEM solutions extends downwards way beyond the HD 7670 OEM, it includes HD 7570, HD 7470, HD 7450, and HD 7350. There's no reason to cheer, though. First, these products are available only in the OEM channels, to pre-built system manufacturers so they could spice their specs sheets up; and second, they're complete re-brands of previous generation HD 6500, 6400, and 6300 families, down to the clock speeds and feature-sets. There are absolutely no HD 7000 series features, no DirectX 11.1, ZeroCore, new media-processing capabilities, nothing. The fineprint of their specifications is tabled below. Details of these chips can be accessed here.
AMD Radeon™ HD 7670 Graphics (OEM Only)
AMD Radeon™ HD 7570 Graphics (OEM Only)
AMD Radeon™ HD 7470/HD 7450 Graphics (OEM Only)
AMD Radeon™ HD 7350 Graphics (OEM Only)