A quad pumped bus is a bus where four signals can travel per clock cycle. This is sometimes called QDR (Quad Date Rate).
A double pumped bus is a bus where two signals can travel per clock cycle. This is sometimes called DDR (Double Data Rate).
The Pentium 4 series of processors uses a quad pumped FSB (Front Side Bus). Meaning, the 400MHz FSB is a 100MHz bus with four signals per cycle (100 x 4 = 400). Likewise, the 533MHz FSB is a 133MHz bus.
HANK
Date: 2002-08-21
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