Did your computer come installed with Windows 8 and UEFI, or did you do it yourself, as I'm having trouble trying to install Windows 8 using UEFI on my computer (same as yours) despite having a BIOS installation that worked perfectly.
I've done all that, but sadly the Vista, 7 and 8 discs I have tried UEFI booting have all hung at different parts of the setup, so it must be something wrong with my hardware as I have also tried ISOs off the internet and those have failed as well.