The following is my mathematic analysis of why I went DDR:
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1st- the Rambus numbers:
PC800 bandwidth/channel=1.6Gigs/second.
However, many primo modules will reach PC1066 and yield:
PC1066 bandwidth/channel=2.1Gigs/second.
Total for 2 channels PC1066 Rambus= 4.2Gigs/second.
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2nd- the DDR numbers:
DDR@166Mhz bandwidth/channel=2.7Gigs/second.
However, many primo modules will reach 184Mhz and yield:
DDR@184Mhz bandwidth/channel=3.0Gigs/second.
When Intel's "Granite Bay" 2 channel DDR chipset is released (Q3/2002):
Total for 2 channels 184Mhz DDR= 6.0Gigs/second!!!
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My KingmaxPC2700 will run at 200Mhz. Even if PC1200 RDRAM comes
along it still will only yield 4.8Gigs/second for 2 channels. And the RDRAM
RIM4200 modules soon to be released are just (2)PC1066s mechanically
connected into a single module, no different from the present situation.
Granted,for the moment, hand-picked RDRAM modules at PC1066 certainly
are the bandwidth king. But when 2 channel DDR motherboards are common
later this year, won't DDR be fastest at 6 Gigs/second?
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1st- the Rambus numbers:
PC800 bandwidth/channel=1.6Gigs/second.
However, many primo modules will reach PC1066 and yield:
PC1066 bandwidth/channel=2.1Gigs/second.
Total for 2 channels PC1066 Rambus= 4.2Gigs/second.
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2nd- the DDR numbers:
DDR@166Mhz bandwidth/channel=2.7Gigs/second.
However, many primo modules will reach 184Mhz and yield:
DDR@184Mhz bandwidth/channel=3.0Gigs/second.
When Intel's "Granite Bay" 2 channel DDR chipset is released (Q3/2002):
Total for 2 channels 184Mhz DDR= 6.0Gigs/second!!!
----------------------------------------------------------------------------
My KingmaxPC2700 will run at 200Mhz. Even if PC1200 RDRAM comes
along it still will only yield 4.8Gigs/second for 2 channels. And the RDRAM
RIM4200 modules soon to be released are just (2)PC1066s mechanically
connected into a single module, no different from the present situation.
Granted,for the moment, hand-picked RDRAM modules at PC1066 certainly
are the bandwidth king. But when 2 channel DDR motherboards are common
later this year, won't DDR be fastest at 6 Gigs/second?