Well, that's basically the question: if you use DDR266 RAM with a P4 CPU and a 400MHz P4 motherboard; will the ram then run at 100MHz, (with the double bandwidth making it 200MHz)?
If this is the case, wouldn't an Athlon CPU running at a comparable CPU-clock and on an Athlon-ready motherboard have a 33% speed advantage on the FSB, thus being the faster system?
ok guys, thanks for your answers.
while we're on the topic: the PCI bus. i have a pci ethernet card running on a 10MB/s ethernet (the card is 10/100). does the speed of the PCI bus in any way limit the speed of the network?
The chipset <i>decouples</i> the FSB and memory, so basically its all bandwidth game. The memory, whatever kind must get the chipset the highest possible bandwidth, which is passed on to the processor on its native bus. So a single channel 133 MHz DDR memory working 2.1 GB/sec can easily be coupled with the P4 native double channel double pumped 100 MHz bus, as the other busses.
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