If you have the invoice or such still then you have a good chance as long as its something they can identify as you as you have other products with them.
(id like to know what happens either way )

Though given the difference between the 8's and current Gen GPU's, its a good excuse to get something new and shiny, will be a huge difference (some of the 560s factory OC'd are really nice atm if your on a budget or not).