SiS unveiled details about its upcoming chipsets for the Intel Penryn processors:
The single-chip family consists of the SiS 680-series, in five different variants. SiS plans to cater the 680-series towards performance, mainstream and entry-level market segments.
The top dog of the SiS 680-series is the 680SCD with support for 1333 MHz front-side bus Penryn processors. The SiS 680SCD features a DDR2 memory controller with support for DDR2-800 and 1066 MHz memory. The single-chip solution is designed with single-graphics in mind with support for a single PCIe x16 slot. Other notable features of the 680SCD include support for four PCIe x1 slots, ten USB 2.0, four SATA 3.0 Gbps ports and Gigabit Ethernet.
On the mainstream side of things are the SiS 680SCE and 680SCH. The two chipsets are identical with the exception of front-side bus support. The SiS 680SCE supports 1333 MHz front-side bus while the 680SCH is limited to 1066 MHz, officially. The SiS 680SCE and 680SCH add a new Mirage 4 graphics core with HDMI output capabilities.
The SiS Mirage 4 graphics core is fully HDCP compliant for Blu-ray and HD DVD video playback. The SiS Mirage 4 graphics core is DirectX 10 compliant with hardware H.264 and VC-1 acceleration. Aside from the integrated graphics core, the SiS 680SCE and 680SCH are identical to the 680SCD.