China's Lenovo overtook U.S. tech giant Hewlett-Packard to become the No. 1 personal computer maker in the world in the second quarter, according to two technology research firms Gartner and IDC.

Lenovo briefly overtook HP as the No. 1 PC maker in third-quarter 2012, but that was only according to data from Gartner. IDC had maintained that HP was on top in the same period.