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Intel® E8870DH DDR Memory Hub DatasheetSystem Architecture The DDR Memory Hub (DMH) is a memory translator hub that provides a mechanism for tunneling DDR SDRAM transactions between a Main Channel (RAMBUS* interface) and two Branch Channels (DDR SDRAM interfaces). While all RAMBUS signals maintain electrical compatibility with RDRAM pins, the RAMBUS signals are logically redefined to packetize DDR SDRAM I/O traffic. The DMH tunnels SDRAM packets between the Main Channel and a Branch Channel with deterministic timing. Read the full Intel® E8870DH DDR Memory Hub Datasheet.