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Politics : Formerly About Advanced Micro Devices
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To: Scot who wrote (83288)12/16/1999 5:08:00 PM
From: Goutam  Read Replies (1) of 1580155
 
Scot,

Thanks for the links. I went to the AMDzone BB and there were several discussions of KX133 availability. It seems that no one has seen a board yet. Do you know what the projected costs for DDR will be? I know it will be cheaper than Rambust...but how much?

DDR DRAM technology is just an evolutionary one from SDRAM - the dies would be slightly larger (5% - 10% for VC) than comparable SDRAM dies, few extra pins on the DIMM module from that of SDRAM DIMM, can be tested using the same test equipment that's used for SDRAMs (low if not zero additional infrastructure costs), low power consumption just as with SDRAMS (DRDRAM modules consume more power and require heat sinks), etc.

MY WAG is that they may carry 40%-50% additional premium initially over the comparable SDRAM DIMMS. The premium should quickly drop down to 10% levels. Several manufacturers have already started manufacturing DDR DRAMS (Hyundai, Micron, Samsung, etc). By the time Athlon chipsets with DDR DRAM support come out, you may see only 10% additional cost over SDRAM.

FYI:

PC1600 DDR DRAM DIMMs use PC100 DDR DRAM chips and the price would be comparable to PC100 SDRAM DIMMs.

PC2100 DDR DRAM DIMMs use PC133 DDR DRAM chips and the
price would be comparable to PC133 SDRAM DIMMs.

The numbers in the DDR DIMMS designations (PC1600, PC2100) are picked to reflect the data rate in Megabytes - for a DDR DRAM DIMM using PC100 DDR DRAM chips, this would be - 100M * 8 Bytes/DIMM * 2 for double data rate = 1600MillionBytes/Sec

Regards,
Goutama
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