Silicon Integrated Systems (SiS) will start volume shipments of its Intel P4 PCIe-enabled core-logic chipsets, the SiS649 and SiS656, in the second half of December, according to the company.

The discrete SiS649 and SiS656 northbridge chips support x16 PCIe lanes, enabling front-side bus (FSB) speeds of up to 800MHz. In the case of the SiS649, there is support for up to 2GB of memory. The SiS656 supports up to 4GB of memory.

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