It's a consumer desktop graphics card. It's made by Nvidia, specifically the GTX480. Because it came directly from Nvidia (who makes the PCBs for the cards) and not one of the companies that actually sells the cards (EVGA, MSI, Palit, Zotac, etc), it is unbranded, which is why you may not have known what it was.
Here's a link to a branded retail version of what we all received:
http://www.newegg.com/Product/Produc...82E16814130617
The cards aren't sold anymore, and have since been replaced with the Nvidia GTX500 series of cards. The GTX480 was the grand-daddy of the Nvidia line up when it first came out though. Historically, the GTX480s have been plagued by issues including outrageous heat output and very high power consumption.
If you plan to use your GTX480, make sure the computer you put it into has a case with very good cooling, and a strong power supply. Look for a supply that has at least 40 or so amps on the +12v rail. Any quality power supply at or above 550 watts should do nicely.