SiS today announced the launch of its newest northbridge for the Intel
Pentium® 4 CPU, the SiS649. The SiS649 is SiS latest chipset designed for the
latest DDR and DDR2 memory standards and PCIe x16, making it an ideal choice for
vendors who need a high performance next-generation platform that also offers
compelling value. Utilizing SiS HyperStreaming™ technology, the SiS649 offers
more advanced data processing and maintains the best resource utilization across
multiple operating environments. In addition, the SiS649 features SiS MuTIOL® 1G
technology, for the smoothest data transfer between South and North Bridges.

Memory-intensive digital multimedia applications will also benefit from the
support for advanced DDR2 offered with the SiS649 chipset. 2 DIMMS are
supported, with a huge 1 GB per DIMM of RAM, for a total of 2GB of system memory
supported. The SiS649 employs an extremely flexible memory architecture, where
vendors can choose either to employ DDR or DDR2 in the design of the
motherboard, giving them added flexibility for changing market conditions.
Vendor samples are available now, with motherboards based on the SiS649 due to
hit the market at September 2004.

Silicon Integrated Systems
Corp. (SiS), a leading supplier of core logic chipsets, today announced the
launch of its newest northbridge for the Intel Pentium® 4 CPU, the SiS649. The
SiS649 is SiS latest chipset designed for the latest DDR and DDR2 memory
standards and PCIe x16, making it an ideal choice for vendors who need a high
performance next-generation platform that also offers compelling value.

The SiS649 was specifically
designed for the latest applications that require high bandwidth. Utilizing SiS
HyperStreaming™ technology, the SiS649 offers more advanced data processing and
maintains the best resource utilization across multiple operating environments.
In addition, the SiS649 features SiS MuTIOL® 1G technology, for the smoothest
data transfer between South and North Bridges.

Memory-intensive digital
multimedia applications will also benefit from the support for advanced DDR2
offered with the SiS649 chipset. 2 DIMMS are supported, with a huge 1 GB per
DIMM of RAM, for a total of 2GB of system memory supported. The SiS649 employs
an extremely flexible memory architecture, where vendors can choose either to
employ DDR or DDR2 in the design of the motherboard, giving them added
flexibility for changing market conditions.

Combined with SiS latest
South Bridge Chipset SiS965, the SiS649 offers vendors a formidable combination
that is ready for the next generation of peripheral devices thanks to PCIe
support. The SiS965 supports PCIe x1, gigabit LAN, 8 USB 2.0 ports, AC 97 7.1
channel sound, 4 SATA (supporting hot plug functionality) and 4 ATA. The SiS965
also supports Multiple RAID disk array modes in RAID 0/1.

"A single channel DDR and
DDR2 solution gives vendors a much needed mainstream option," said Daniel Chen,
President and CEO of SiS. "With the SiS649, SiS is proud to once again give
vendors a world-first technology with support for single-channel DDR2."

SiS PCI Express Northbridge Chipset
Chipset Model SiS649 SiS656
FSB 800 MHz 800 MHz
Memory Single Channel DDR-400/DDR2-533 Dual Channel DDR-400/DDR2-667
Graphic PCI Express x16 PCI Express x16
Paired PCI Express Southbridge Chipset SiS965/SiS965L SiS965/SiS965L

SiS PCI Express Southbridge Chipset
Chipset Model SiS965 SiS965L
MuTIOL® 1G Technology Yes Yes
PCI Express x1 2 Ports 2 Ports
Serial ATA 4 Ports 2 Ports
RAID RAID0, 1, 0+1, JBOD RAID0, 1, JBOD
USB 2.0 8 Ports 8 Ports
ATA 133 2 Channel 2 Channel
Paired PCI Express Northbridge Chipset SiS649/SiS656/SiS756 SiS649/SiS656/SiS756
Other Paired Northbridge Chipset SiS655TX, SiS655FX, SiS648FX, SiS661FX
SiS755FX, SiS755, SiS760, SiS760GX, SiS741, SiS748
SiS655TX, SiS655FX, SiS648FX, SiS661FX
SiS755FX, SiS755, SiS760, SiS760GX, SiS741, SiS748

Vendor samples are
available now, with motherboards based on the SiS649 due to hit the market at
September 2004.

About SiS649 Northbridge
Chip
Host Interface
– Support Intel® Pentium® 4 800/533/400MHz Front-Side Bus CPU
– Support Intel® Hyper-Threading Technology
Flexible DDR2/DDR Memory Controller
– Support DDR-400/333/266, Delivering up to 3.2GB/s Bandwidth
– Support DDR2-533/400, Delivering up to 4.2GB/s Bandwidth
– Support up to 1GB per DIMM, Total 2 DIMMs
Support PCI Express x16 Graphic Port
MuTIOL® 1G Delivering 1GB/s Bandwidth
– Proprietary Interconnect between SiS649 and SiS965
– Bi-Directional 16-bit Data Bus at 533MHz Operating Frequency
Support proprietary HyperStreaming™ Technology

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