Chipset overview
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Figure 3. Processor and slot positions
Chipset overview
Built on the Intel 5500/5600 series processor and the 5520 chipset, the SB5520DT1
motherboard provides the performance and feature set required for dual-processor-based high-
end systems that are optimized for high-performance computing (HPC) and clustering servers.
The SB5520DT1 chipset consists of dual 5520 IO hubs and an ICH10R (South Bridge). With the
Intel QuickPath Interconnect (QPI) controller built in, the Intel 5500 Series Processor is the first
dual-processing platform to offer the next generation point-to-point system interconnect
interface. This interface replaces the current Front Side Bus Technology, substantially enhancing
system performance and scalability.
The 5520 IO Hub connects to each processor through an independent QPI link. Each link
consists of 20 pairs of unidirectional differential lanes for transmitting and receiving signals and a
differential forwarded clock. A full-width QPI link pair provides 84 signals.
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