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Quad data rate

Quad data rate (QDR, or quad pumping) is a communication signaling technique wherein data are transmitted at four points in the clock cycle: on the rising and falling edges, and at two intermediate points between them. The intermediate points are defined by a second clock that is 90° out of phase from the first. The effect is to deliver four bits of data…

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PhaseIntelPentium 4AtomCeleron
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Quad data rate

Nodes14
Edges13
Triples0
Avg. degree1.86
Density0.142857
Components1

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data clock rate cycle qdr signal quad frequency intel systems four points intermediate lines operate technology ddr simple contention transfer

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