This question already has an answer here:
Yesterday I was so excited to see new release. After creating live USB I was not able to boot it.
I have disable UEFI to legacy and selected USB as boot option to my dell laptop, and I can only see Black screen after Dell Logo for rest of night.
I have Dell Inspiron i7, 16GB Ram 2GB Nvidia and SSD.
P.S. Note I can boot Fedora 20 Live USB with same configuration :(