Memory technology evolution: an overview
of system memory technologies
technology brief, 8
th
Abstract.............................................................................................................................................. 2
Introduction......................................................................................................................................... 2
Basic DRAM operation ......................................................................................................................... 2
Memory access time......................................................................................................................... 4
Memory bus speed........................................................................................................................... 5
Burst mode access............................................................................................................................ 5
SDRAM technology .............................................................................................................................. 6
Bank interleaving ............................................................................................................................. 7
Increased bandwidth ........................................................................................................................ 7
Registered SDRAM modules .............................................................................................................. 7
DIMM Configurations ....................................................................................................................... 8
Memory channel interleaving .......................................................................................................... 10
Fully-Buffered DIMMs...................................................................................................................... 15
Rambus DRAM .............................................................................................................................. 18
Conclusion........................................................................................................................................ 19
For more information.......................................................................................................................... 20
Call to action .................................................................................................................................... 20
edition
Rank interleaving.......................................................................................................................... 9
DDR-1 ....................................................................................................................................... 11
DDR-2 ....................................................................................................................................... 13
DDR-3 ....................................................................................................................................... 14
FB-DIMM architecture.................................................................................................................. 16
Challenges ................................................................................................................................ 17
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