Silicon Integrated Systems (SiS, Traditional Chinese: 矽統科技) is a company that manufactures, among other things, motherboard chipsets. The company was founded in 1987 in Hsinchu Science Park, Taiwan.
In the late 1990s, SiS made the decision to invest in their own chip fabrication facilities. At the end of 1999, SiS acquired Rise Technology and that company's failed mP6 x86 core technology.
Motherboard chipsets
One of the most famous chipsets produced by SiS was the late 486-age chipset 496/497 which supported PCI bus among older ISA- and VLB-buses. Motherboards using this chipset and equipped with CPUs such as the Intel 80486DX4, AMD 5x86 or Cyrix Cx5x86 processors had performance and compatibility comparable with early Intel Pentium systems in addition to a lower price.
After this late success, SiS continued positioning itself as a budget chipset producer. The company emphasized high integration to minimize the cost to implement their solutions. As such, SiS one-chip motherboard chipsets that included integrated video, such as the Socket 7-based SiS 5596, SiS 5598, and SiS 530 along with the Slot 1-based SiS 620. These were some of the first PC chipsets with such high integration. They allowed entire system solutions to be built with just a motherboard, system RAM, and a CPU.
Socket7
The SiS 530(Sindbad)/SiS5595 supported Socket 7, SDRAM 1.5GB max., a bus frequency from 66 MHz to 124 MHz, and can have from 2 to 8 MiB shared memory for an integrated AGP SiS 6306 2D/3D graphics controller. Includes integrated UDMA66 IDE controller. Motherboards 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. The graphics controller had Direct3D 6.0 and OpenGL support, although it was a very low-performance product for 3D acceleration.
SiS 540 (Spartan) integrates SiS 300 graphics controller.
Socket 370, Slot 1
- SiS 600/SiS 5595
- SiS 620/SiS 5595
- SiS 630 - includes North- and South bridges (SiS 960) and 2D/3D graphics controller (SiS 305)
- SiS 633
- SiS 635
Socket 478
SiS and ALi were the only two companies initially awarded licenses to produce third party chipsets for the Pentium 4. SiS developed the 648 chipset with this license.
- SiS 640 (IGP)
- SiS 645
- SiS 645DX
- SiS 648
- SiS 648FX
- SiS 650 (IGP)
- SiS 651 (IGP)
- SiS 652 (IGP)
- SiS 655
- SiS 655FX
- SiS 655TX
- SiS R658 (Rambus)
Socket A, Slot A
- SiS 730
- SiS 733
- SiS 735
- SiS 740/SiS 961
- SiS 741/SiS 964
- SiS 745
- SiS 746
- SiS 746FX
- SiS 748
Socket 775
- SiS 649
- SiS 655 (AGP chipset)
- SiS 656
- SiS 662 (IGP)
- SiS 671
- SiS 672
Socket 940, 754
- SiS 755/SiS 964
- SiS 760/SiS 964
SiS created a multimedia chipset for the Xbox 360.
Graphics chipsets
- SiS 300
- SiS 301
- SiS 305
- SiS 315
- SiS 320
- SiS 326
- SiS 330
- SiS 340
- SiS 360
- SiSM672, dual output (primary output max. 1280x800, Seconday output max. 800x600)
- SiS671
- SiS671FX
- SiS671DX
- SiSM671MX
- SiS968
