Complex sentence: In 2001, Intel delivered ICH3, which was available in two versions, a server one (ICH3-S) running with the E7501 Northbridge, and a mobile version (ICH3-M), which worked with the i830 and i845 northbridges.
Split into simpler sentences: In 2001, Intel delivered ICH3, which was available in two versions. And the mobile version, ICH3-M, which worked with the i830 and i845 northbridges.