Loongson processor-based dual-processor dual-north bridge mainboard

The invention discloses a Loongson processor-based dual-processor dual-north bridge mainboard. The mainboard comprises a primary Loongson processor, a secondary Loongson processor, a primary north bridge chip and a second north bridge chip, wherein the primary Loongson processor is connected with the secondary Loongson processor through an HT bus; the primary Loongson processor is connected with the primary north bridge chip through an HT bus; the secondary Loongson processor is connected with the secondary north bridge chip through an HT bus; and both the primary north bridge chip and the secondary north bridge chip can be connected with a plurality of PCIE devices through PCIE buses. Through above manner, IO extension can be realized through a manner of connecting the secondary north bridge chip and the secondary Loongson processor, so that the system bandwidth of the mainboard is improved and benefit is brought to performance development of a CPU and an internal memory. 本发明公开了种基于龙芯处理器的双处理器双北桥主板，包括：主龙芯处理器、次