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To: Tenchusatsu who wrote (161230)3/7/2002 8:57:30 AM
From: John F. Dowd  Respond to of 186894
 
Tench: Consider this from Yahoo:

Re: Pentium 4 Platform (Ace's Hardware)
by: kerry_lass 03/07/02 08:34 am
Msg: 364792 of 364797


Extract::
"However, the DDR SDRAM technology is clearly reaching it's signal integrity limits. Consider this:

Intel only supports 4 banks of PC2100 memory or maximum 1 GB to ensure the best stability (signal integrity!).
With two DIMMs, the SiS645 chipsets can run the best DDR SDRAM on the market only with a CAS latency of 2.5
With three DIMMs, the SiS645 boards have to throttle back to PC2100 (see here).
With four DIMMs, the VIA's P4X266 has to throttle back to PC1600 for stability reasons (VIA chipsets natively only supports 6 physical banks of memory)
Many of the DDR boards experienced stability problems when we tried to run with three DIMMs.
PC2100 clearly lacks bandwidth when it must feed 2.6 to 3 GHz Pentium 4s and it becomes clear that DDR-I is not the best choice for an intensive workstation that needs huge amounts of memory. It is very doubtful that any current chipset is able to drive more than 1.5 GB of PC2100 memory, let alone PC2700."
JFD