Unfortunately I can't find a reference to the clock speed anywhere on the packaging. The box does look like those, it actual looks like this:http://www.sapphiretech.com/images/product/gallery/0262/262_20090714_6458.jpg
One of the images of the OC version from the Sappire website has a 'Overclock' sticker over the Vapor-X logo, but the rest of the images don't.http://www.sapphiretech.com/images/product/gallery/0259/259_20090526_483.jpg
I'm not sure if all the OC versions would have that sticker or not? I guess the only way I will be able to tell is to plug it in?