Silicon Integrated Systems

Silicon Integrated Systems (SiS; Chinese: 矽統科技; pinyin: Xìtǒng Kējì) is a company that manufactures, among other things, motherboard chipsets. The company was founded in 1987 in Hsinchu Science Park, Taiwan.

Business

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 its mP6 x86 core technology. Silicon Integrated Systems (SiS) acquired Hycon Technology on January 1, 2025. The acquisition involved SiS issuing 0.8713 shares for every Hycon share, totaling 27,755,080 shares.

Mainboard 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. Mainboards 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 mainboard 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 mainboard, system RAM, and a CPU.

386 & 486 (Socket 1, 2, 3)

SiS 310,320,330 "Rabbit"
SiS 401/402 ISA
SiS 406/411 EISA, Vesa Local Bus
SiS 460 ISA, Vesa Local Bus
SiS 461 ISA, Vesa Local Bus
SiS 471 ISA, Vesa Local Bus
SiS 496/497 ISA, VLB, PCI

Chipset	Release date	Part numbers	South Bridge	Socket	Processors	FSB	Memory types	Max. memory	Parity/ECC	L2 Cache Type	VLB support	PCI support
SiS 310, 320, 330	1991	SiS 85C310, SiS 85C320,SiS 85C330	N/A	132-pin PGA	386DX	25/33/40 MHz	FPM	32 MB	??	Async.	No	No
SiS 401/402		SiS 85C401, SiS 85C402	132-pin PGA, Socket 1/2/3	386DX, 5V 486	25/33/40/50 MHz	64 MB	Parity
SiS 406/411	1991?	SiS 85C406, SiS 85C411
SiS 460	1993	SiS 85C460	Yes
SiS 461		SiS 85C461
SiS 471	1994	SiS 85C471	Socket 1/2/3	5 V/3.3 V 486, Am5x86, Cx5x86, Pentium Overdrive	128 MB
SiS 496/497	1995	SiS SiS85C496, SiS SiS85C497	SiS 497	FPM, EDO	256 MB	2.0

Pentium (Socket 4,5,7)

SiS 501/502/503 ISA, PCI
SiS 5511/5512/5513 ISA, PCI
SiS 5571 ISA, PCI
SiS 5581 ISA, PCI
SiS 5582 ISA, PCI
SiS 5591/5595 ISA, PCI, AGP

The SiS 530 (Sindbad) with SiS 5595 southbridge supported Socket 7, SDRAM 1.5 GB 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. 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. 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.

Chipset	Release date	Part numbers	South Bridge	Socket	Processors	FSB	Memory types	Max. memory	Max. cacheable	Parity/ECC	L2 Cache Type	PCI support	Graphics slot	IGP
SiS 501/502/503	1995	SiS 85C501, SiS 85C502,SiS 85C503	SiS 503	Socket 4 Socket 5/7	Pentium, AMD K5, Cyrix 6x86	50/60/66 MHz	FPM	128 MB	128 MB	N/A	Async.	2.0	N/A	No
SiS 5101/5102/5103		SiS 5103	FPM, EDO	512 MB	512 MB
SiS 5501/5502/5503		SiS 5503	?
SiS 5511/5512/5513		SiS 5513	Socket 5/7	512 MB 1 GB may be possible	?	Parity	Async. / Pburst	2.1
SiS 5596/5513	1996		Pentium, Pentium MMX, 6x86, AMD K5/K6, Rise mP6, IDT Winchip	512 MB		N/A	SiS 6205
SiS 5571		Northbridge integrated	Socket 7	50/60/66/75 MHz	FPM, EDO, SDRAM	384 MB	64 MB?	No
SiS 5120	1997		128 MB
SiS 5581
SiS 5582
SiS 5597		SiS 5597
SiS 5598	SiS 5598
SiS 5591/5595	1998		SiS 5595	768 MB	256 MB	AGP 1×/2×	No
SiS 5592/5595
SiS 530		66/75/83/90/95/100 MHz	1536 MB	2.2	N/A	SiS 6306
SiS 540	1999		Northbridge integrated	SDRAM, VCSDRAM	512 MB	ECC	2.2	SiS 300

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) on one chip
SiS 633
SiS 635

Chipset	Release date	South Bridge	Socket	Processors	FSB	Memory types	Memory bus	Max. memory	Graphics slot	IGP
SiS 5600	1998	SiS 5595	Slot 1	Pentium II/III, Celeron	66/100 MHz	FPM, EDO, SDRAM	66/100 MHz SDR	1.5 GB	AGP 1×/2×	No
SiS 600
SiS 620	Aug 1998	Slot 1, Socket 370	SDRAM	N/A	SiS 6306
SiS 630	2000	Northbridge integrated	66/100/133 MHz	SDRAM, VCSDRAM	66/100/133 MHz SDR	SiS305
SiS 630S	SDRAM	AGP 2×/4×
SiS 630ST	2001	Socket 370	Pentium III, Tualatin, Celeron
SiS 630E	2000	Slot 1, Socket 370	Pentium II/III, Celeron	N/A
SiS 630ET	2001	Socket 370	Pentium III, Tualatin, Celeron
SiS 633	Pentium III, Celeron	AGP 2×/4×
SiS 633T	Pentium III, Tualatin, Celeron
SiS 635	Pentium III, Celeron	SDRAM, DDR	100/133 MHz SDR, 200/266 MHz DDR	No
SiS 635T	Pentium III, Tualatin, Celeron
SiS 640T	Never released	SiS961, SiS961B	100/133 MHz SDR, 200/266 MHz DDR?	AGP 2×/4×?	SiS315

Socket 478, Socket 775

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 648 B Stepping supports Intel Hyper-Threading CPU on some motherboards like MSI 648 Max).

Chipset	Release date	South Bridge	Socket	Processors	FSB	Memory types	Memory bus	Max. memory	Graphics slot	IGP
SiS 645	2001	SiS961, SiS961B	Socket 423, Socket 478	Pentium 4, Celeron	400 MHz	SDR SDRAM, DDR SDRAM	100/133 MHz SDR, 200/266/333 MHz DDR	3 GB	AGP 2×/4×	No
SiS 645DX	2002	SiS961, SiS962, SiS962L	Socket 478	400/533 MHz
SiS 650	2001	SiS961, SiS961B	Socket 423, Socket 478	400 MHz	100/133 MHz SDR, 200/266 MHz DDR	SiS315
SiS 650GX		100/133 MHz SDR, 200/266/333 MHz DDR
SiS 651		SiS962, SiS962L	Socket 478	400/533 MHz
SiS 648		SiS963, SiS963L	DDR SDRAM	200/266/333 MHz DDR	AGP 4×/8×	No
SiS 648FX	2003	SiS963, SiS963L, SiS964	Socket 478, Socket 775	Pentium 4, Pentium 4 EE, Celeron, Celeron D	400/533/800 MHz	200/266/333/400 MHz DDR
SiS 655	SiS963, SiS963L	Pentium 4, Celeron	400/533 MHz	Dual Channel DDR SDRAM	266/333/400 MHz DDR	4 GB
SiS 655FX		SiS964, SiS964L	Socket 478	Pentium 4, Pentium 4 EE, Celeron, Celeron D	400/533/800 MHz
SiS 655TX		Socket 478
SiS 661FX	2003	Socket 478, Socket 775	DDR SDRAM	3 GB	Mirage
SiS 661GX
SiS 656		SiS965, SiS965L	Socket 775	Pentium 4, Pentium 4 EE, Celeron D	533/800 MHz	Dual Channel DDR/DDR2 SDRAM	266/333/400 MHz DDR, 400/533 MHz DDR2	4 GB	PCI-E x16	No
SiS 656FX		SiS966, SiS966L	Pentium 4, Pentium 4 EE, Pentium D, Celeron D	266/333/400 MHz DDR, 400/533/667 MHz DDR2
SiS 649		SiS965, SiS965L	Pentium 4, Pentium 4 EE, Pentium D, Celeron, Celeron D	400/533/800 MHz	DDR SDRAM, DDR2 SDRAM	200/266/333/400 MHz DDR, 400/533 MHz DDR2	2 GB
SiS 649FX		SiS966, SiS966L
SiS 649DX		DDR2 SDRAM	400/533 MHz DDR2
SiS 662		Pentium 4, Pentium 4 EE, Pentium D, Core 2 Duo, Pentium Dual Core, Celeron, Celeron D	533/800 MHz	400/533/667 MHz DDR2	Mirage 1
SiS 671		SiS968	533/800/1066 MHz	4 GB	SiS351 (Mirage 3)
SiS 671FX
SiS 671DX
SiS 672		533/800 MHz
SiS R658		SiS963, SiS963L	Socket 478	Pentium 4, Celeron	400/533 MHz	Dual Channel RDRAM	PC1066 RDRAM/RIMM 4200/4800	4 GB (1 GB per Channel)	AGP 4×/8×	No

Socket A (Socket 462), Slot A

Chipset	Release date	Southbridge	Processors	FSB	Memory types	Memory bus	Max. memory	AGP	IGP
SiS 730	Dec 2000	Northbridge integrated	Slot A, Socket A	100/133 MHz	SDR SDRAM	100/133 MHz SDR	1.5 GB	2×/4×	SiS305
SiS 733		200/266 MHz	No
SiS 735		SDR SDRAM, DDR SDRAM	100/133 MHz SDR, 200/266 MHz DDR
SiS 740		SiS961, SiS962L	Socket A	SiS315
SiS 745	2001	Northbridge integrated	100/133 MHz SDR, 200/266/333 MHz DDR	3 GB	No
SiS 746		SiS963, SiS963L	DDR SDRAM	200/266/333 MHz DDR	4×/8×
SiS 746FX		200/266/333 MHz	200/266/333/400 MHz DDR
SiS 748	2003	200/266/333/400 MHz
SiS 741GX	SiS964, SiS964L	266/333 MHz	266/333 MHz DDR	Mirage
SiS 741	266/333/400 MHz	266/333/400 MHz DDR

Socket 940, 754, 939, AM2

Memory support is dependent on the CPU

Chipset	Release date	Southbridge	Processors	HT	Graphics slot	IGP
SiS 755	2003	SiS963, SiS963L, SiS964, SiS964L	Socket 754	HT 800	AGP 4×/8×	No
SiS 755FX	2004	SiS964, SiS964L	Socket 939	HT 1000
SiS 760	2003	Socket 754	HT 800	Mirage 2
SiS 760GX	2004	Socket 754, Socket 939
SiS 756	SiS965, SiS965L	HT 1000	PCI-E x16	No
SiS 761GX	2005	SiS964, SiS964L, SiS965, SiS965L	Socket 754, Socket 939, Socket AM2	Mirage 1
SiS 771	2006	SiS966, SiS966L, SiS968	Socket AM2	SiS351 (Mirage 3)

SiS created a multimedia chipset for the Xbox 360.

Southbridge chips

Paired with later SiS chipsets, such as the 661GX/761GX, which adopt a standard two-chip chipset design (instead of single-chip, like the older SiS 630/730 series chipsets). 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.

Southbridge	Release date	NB/SB Interconnect	PCI Express/Ports	Serial ATA/RAID	Parallel ATA	USB	Audio	LAN MAC	IEEE 1394
SiS 497	1995	VLB	N/A	N/A	4x PIOATA Devices	N/A	N/A	N/A	No
SiS 503	Local Bus, PCI	N/A
SiS 5103	4x PIO/WDMA ATA Devices
SiS 5503
SiS 5513
SiS 5595	1997	PCI	4x ATA/33 Devices	1.1, 2 ports
SiS 961	2001	MuTIOL®, 533MB/s	4x ATA/100 Devices	1.1, 6 ports	AC'97	10/100
SiS 961B	?	4x ATA/133 Devices
SiS 962	2002	2.0, 6 ports	Yes
SiS 962L	No
SiS 963	MuTIOL® 1G, 1GB/s	Yes
SiS 963L	No
SiS 964	2003	2x SATA/150, RAID 0,1,JBOD	2.0, 8 ports
SiS 964L
SiS 965	2005?	PCIe x1, 2 lanes	4x SATA/150, RAID 0,1,0+1,JBOD	10/100/1000 (SiS 191)
SiS 965L	2x SATA/150, RAID 0,1,JBOD	10/100 (SiS 190)
SiS 966	4x SATA/150 (AHCI), RAID 0,1,0+1,JBOD	AC'97/HD Audio	10/100/1000 (SiS 191)	No
SiS 966L	2x SATA/150 (AHCI), RAID 0,1,JBOD	10/100 (SiS 190)
SiS 968	2007?	2x SATA/300 (AHCI), RAID 0,1,JBOD	2x ATA/133 Devices	HD Audio	10/100/1000	No

Graphics chipsets

SiS 6201
SiS 6202
SiS 6205
SiS 6215
SiS 6225
SiS 6306
SiS 6326
SiS 300
SiS 305
SiS 315
SiS 320 (Xabre 80)
SiS 330 (Mirage IGP)
SiS 340 (Xabre 200)
SiS 360 (Xabre 400)
SiS 380 (Xabre 600)

Discrete 3D Graphics chips

Model	Launch	Fab (nm)	Bus interface	Core clock (MHz)	Memory clock (MHz)	Core config1	Fillrate	Memory	API support
MOperations/s	MPixels/s	MTexels/s	MVertices/s	Size (MB)	Bandwidth (GB/s)	Bus type	Bus width (bit)	Direct3D	OpenGL
SiS 6326	1997		AGP 1× PCI	40	45-80 45–9066–133	1:0:1:1	40	40	40	0	2-8	0.36-0.64 0.36-0.720.53-1.06	FPM EDOSDR	64	5.0	N/A
SiS 300	2000	250 nm	AGP 4× PCI	125	166	125	125	125	0	64	2.66	SDR	128	6.0	1.1
SiS 305	2000	250 nm	AGP 4× PCI	125	125	125	125	125	0	32	1.00	SDR	64	6.0	1.1
SiS 315	2001		AGP 4× PCI	166	166 333	2:0:4:2	333	333	667	0	64	2.66 5.33	SDR DDR	128	7.0	1.3
SiS 315E	2001		AGP 4× PCI	143	143 286	2:0:2:2	286	286	286	0	32	1.14 2.28	SDR DDR	64	7.0	1.3
Xabre 80	2002	150 nm	AGP 4×	200	333	4:1:8:4	800	800	1600	50	64	5.33	DDR	128	8.1	1.3
Xabre 200	2002	150 nm	AGP 8×	200	400	4:1:8:4	800	800	1600	50	32 64	6.40	DDR	128	8.1	1.3
Xabre 400	2002	150 nm	AGP 8×	250	400	4:1:8:4	1000	1000	2000	67.5	64 128	8.00	DDR	128	8.1	1.3
Xabre 600	2002	130 nm	AGP 8×	300	600	4:1:8:4	1200	1200	2400	75	64 128	9.60	DDR	128	8.1	1.3

Integrated 3D Graphics

Model	Core	Launch	Fab (nm)	Bus interface	Core clock (MHz)	Memory clock (MHz)	Core config1	Fillrate	Memory	API support
MOperations/s	MPixels/s	MTexels/s	MVertices/s	Size (MB)	Bandwidth (GB/s)	Bus type	Bus width (bit)	Direct3D	OpenGL
SiS 530/620	SiS 6306	1998		Ultra AGP	40	66-100	1:0:1:1	40	40	40	0	1-8	0.533-0.8	SDR	64	5.0	N/A
SiS 540	SiS 300	1999		Ultra AGP	?	66-133	1:0:1:1	?	?	?	0	4-64	0.533-1.066	SDR	64	6.0	1.1
SiS 630	SiS 305	2000		Ultra AGP	125	66-133 (System) ??? (EGM)	1:0:1:1	125	125	125	0	4-64	0.533-1.066 (System) ??? (EGM)	SDR	64 (System) 128 (EGM)	6.0	1.1
SiS 730	SiS 305	2000		Ultra AGP	125	100-133 (System) ??? (EGM)	1:0:1:1	125	125	125	0	4-64	0.8-1.066 (System) ??? (EGM)	SDR	64 (System) 128 (EGM)	6.0	1.1
Real256	SiS 315	2001		Ultra AGP	166	100-133 266–333	2:0:4:2	333	333	667	0	32-64	0.8-1.066 (SDR) 2.1-2.656 (DDR)	SDR DDR	64	7.0 (no T&L)	1.3
Mirage (Real256E)	SiS 315	2003		Ultra AGP	200	266-400	2:0:4:2	400	400	800	0	32-64	2.1-3.2	DDR	64	7.0 (no T&L)	1.3
Mirage 1	SiS 330	2004		Ultra AGP	200	266-400	2:0:4:2	400	400	800	0	32-64	2.1-6.4 (DDR) 3.2-12.8 (DDR2)	DDR DDR2	64 128 (AMD K8 only)	7.0 (no T&L)	1.3
Mirage 2		2004		Ultra AGP	200	266-400 400–800	4:0:8:4	800	800	1600	0	32-256	2.1-6.4 (DDR) 3.2-12.8 (DDR2)	DDR DDR2	64 128	8.1	1.4
Mirage 3	SiS 351	2006		Integrated	250	400-667	2:0:4:2	500	500	1000	0	32-256	3.2-5.3 (Intel) 3.2-12.8 (AMD)	DDR2	64 128 (AMD K8 only)	9.0	1.5
Mirage 3+		2007		Integrated	300	400-667	2:0:4:2	600	600	1200	0	32-256	3.2-5.3	DDR2	64	9.0	1.5
Mirage 4		Never released		Integrated	?	400-1066	?	?	?	?	?	?-256	3.2-17.0	DDR2	64 128	10.0 (PS 4.0/VS 3.0)	2.0

1Pixel shaders: vertex shaders: texture mapping units: render output units

Some cards contain a 3D graphics accelerator but it is only functional with the SiS's Proprietary Windows-only driver (the company does not provide documentation for others to write drivers). However, the Linux kernel includes a working third party driver that, while not supporting 3D gaming, makes the cards usable under Linux.

Touch-Screen chipsets

SiS 9202
SiS 9203
SiS 9220P
SiS 9223
SiS 9250
SiS 9250H
SiS 9251
SiS 9252
SiS 9255
SiS 9272
SiS 9275
SiS 9277