Re: [OTish] Athlon RAM?

["Paul Gordon" <paul_gordon@xxxxxxx>]

>Thinking about a new Athlon 1.4 and board (to build a ShowShifter
machine).
>
>1.4 Athlons seem to have 266 FSB.  Does this require DDR RAM?  Is DDR
RAM
>266Mhz?  Can you use PC133 RAM?
>
>Help

Not necessarily the same thing at all Mark. (I made the same mistake), a
266FSB Athlon is not necessarily DDR, in fact it's not really appropriate
to
talk about about it in that fashion - DDR refers to the rate of memory
transfers between the memory modules and the memory controller chipset on
the motherboard, (NOT the frequency of those transfers), so it's really a
motherboard and memory module requirement to support DDR memory. DDR memory
still operates at 266MHz, but the double-data rate refers to the fact that
the memory controller read/writes two bits of memory on each clock cycle,
(one on the rising edge of the square wave, and one on the falling edge),
rather than just one bit per cycle, so the frequency remains the same, but
the data rate doubles.

Clearer?

Paul G.




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