In small form factor (SFF) platforms, motherboard space, and power are some of the most critical factors for their design. System memory bus is one of the major contributors to the I/O power consumption. Historically, the memory bus has always been terminated on the motherboard at the receiver end to meet SI/timing requirements. But these terminations result in significant power dissipation. This paper investigates the impact of removing these terminations [No-ODT (On Die Termination) for Data/Strobe and No-RttParallel termination for Command/Control (CMD/CNTL) for different memory configurations], and provides motherboard routing recommendations to support No-ODT/No-Rtt without violating SI/timing specs. This paper also highlights the savings in power and motherboard space achieved by removing these terminations.
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