Since the release of Precision XOC on 5/27/2016 which wants the graphics card's Serial Number (SN or S/N), there have been some forum members (in varying degrees of irateness and otherwise) either wondering where to find it or how to get it without opening up their PC and/or disturbing/removing hardware. You can in a few different places/ways.You can find it on the product sticker, or on the product box, and most likely on the sales invoice. Bcavnaugh Sorry, I cannot believe users having a crises over their Serial Numbers. • I agree with bcavnaugh. Common sense says to keep the box or write down your serial number just in case you need it for something.