After some time of negotiation, Silicon Integrated Systems (SiS) announced that it has acquired 533MHz FSB (front-side bus) technology licensing for its Pentium 4 chipsets from Intel. Although the license will secure SiS’s opportunity to keep expanding in the P4 chipset market, the future expansion has inevitably become harder amid intense competition from Intel and VIA Technologies. With improving yield rates, SiS’s sales performance has been significantly boosted by its P4 chipsets. Being the first company to mass-produce P4-based integrated chipsets, SiS has successfully increased its presence in the contract-manufacturing sector, one of Intel’s key markets, with its SiS650. Currently, clients for the company’s SiS650 chipset include Hewlett-Packard (HP) and IBM in the desktop field and HP, NEC and Toshiba in notebooks and Elitegroup Computer Systems (ECS) in motherboards. As for its discrete chipset line, SiS’s sales of SiS645 chipsets have been relatively hampered by Intel’s own 845 series. According to market estimates, SiS shipped around 600,000 SiS650 chipsets in March, but only 200,000 SiS645 chipsets.