Silicon Integrated Systems (SiS; Chinese: 矽統科技; pinyin: Xìtǒng Kējì) is a company that manufactures, among other things, motherboard chipsets.

The company emphasized high integration to minimize the cost to implement their solutions.

mainboards using the SiS 530 were positioned as cheap office platforms and paired often with low-cost chips from Intel competitors, such as the AMD K6 series or Cyrix 6x86.

[4] Memory support is dependent on the CPU SiS created a multimedia chipset for the Xbox 360.

SiS southbridges can handle IDE, LAN (accompanied by a PHY chip), audio (with an AC'97 codec), along with other types of I/O.

SiS' proprietary MuTIOL interconnect connects the southbridge chip to the northbridge, which contains the RAM controller (for chipsets targeted at Intel platforms) and interfaces with the CPU.