No. 4: Valley Of The Sun -- Phoenix, Ariz.
California isn't the only home to a hot tech valley. Phoenix lays claim to numerous high-tech companies, such as domain-name and web-hosting leader Go Daddy and digital presence management company Limelight Networks. Even Intel pitched a tent in its backyard, and in 2011 it announced plans to build a $5 billion chip manufacturing facility in nearby Chandler, Ariz. And that wasn't the only boost the city got that year. According to Dice's survey, the average year-over-year salary growth in Phoenix jumped from $74,950 in 2011 to $83,607 in 2012 for an impressive 11.5 percent increase.