Intel's FSB vs AMD's FSB............

Until now, Intel is still using FSB in their motherboards but AMD is using HyperTransport since 2003..

But I'm not talking about the AMD64, but rather the old Athlon XP's FSB....

As Intel's FSB is Quad Pump from Pentium 4 up to their Core 2 Quad...

If we all look back from from the Pentium 4 HT vs Athlon XP 3000+...the FSB is 800Mhz for Intel & 400Mhz for AMD..
Intel is really 200Mhz w/c is quad pump so equals to 800...

Questions:

How does Quad Pump FSB works..??
And if Intel is Quad pump, what's in AMD's old FSB...?? (not the AMD64)

Both Intel and AMDs FSB "truly" run at 200MHz. AMDs is double pumped to 400MHz, while Intel quad pumps to 800MHz or higher. (some C2D and C2Q run at 1066MHz or 1333MHz.)

Double or quad pumping happens by sending more then one bit per clock cycle. Think of the basic wave form. (base, +, -, base) While I don't know how, I do know Intel sends 4 bits per clock cycle, while AMD sent 2. If you can send 4 bits per clock cycle, then you have effectively quadrupled your speed. This is why you have 200MHz actual, 800MHz effective.