Well first you should get all your box's back if i was you
you can check out you hardware ID's through your system tools
but it's also good to check and open up the case, it should say it actually on the card what model etc it is...
But i still never trust a computer store even if they give u something right it's extremely old stock, i know because my auntys and cousins bought comps and i opened it up and i knew the hdd or the gfx was a old batch it was soo obvious
gay gay people, that's how they clean their redundant and old stock, by tricking you people, so to conclude don't trust these comp stores at all!! especially azns lol