Taking a look at the retail packaging for the Sapphire Dual-X R9 280 OC, the key features are called out on the front of the box. These features include a factory overclock, 3GB GDDR5, Dual-X Cooling, GCN architecture (which supports TrueAudio and Mantle), and Eyefinity compatibility. If more information is needed, the back of the box goes into much more detail.
Taking out the inner box, we find the card is placed in an bubble anti-static bag, nestled in a cardboard block with an additional piece of cardboard to protect it. While the higher end cards use a form fitted foam block (which is much nicer) this is sufficient to protect the card in transit.
Most video cards include some type of accessories, Sapphire includes the standard driver disc, user manual, marketing material and a CrossFire bridge. Two single 4-pin Molex to PCIe 6-pin power adapters and a HDMI cable are included as well.