What HiVizMan already says contact your supplier was the box closed when you bought it or did they already opend it in the shop if that is the case then you also know were the stickers is.
And otherwise contact asus support.
l Asus Rampage 4 Extreme l intel 3930X@ 4800Mhz (1.45volt) 24/7 l Asus matrix GTX 580 l
16GB Team Xtreem DDR3 PC3-20800 2600MHz (11-11-11-28-1) l Coolermaster Silentpro 1000w PSU l Revodrive3 ssd l WD Raptor 150Gb (10000rpm) l Corsair H100 wc with 4 Cougar Vortex fans l CM HAF 932 Avanced case l Acer X243H 24'' l Asus RT N66U Dark Knight l Logitech Z2300 speakers
In progress the custom build PC Samurai Warrior ''Miyamoto Musashi'' in Japanese ''宮本 武蔵'' made by Pascal