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DDR SDRAM Evolution and Specifications

Yapay zekadan makale özeti

History and Basics: DDR SDRAM was invented by IBM in late 1980s
First commercial DDR chip released by Samsung in 1998
JEDEC finalized DDR specification in June 2000
DDR1 was superseded by DDR2, DDR3, DDR4, and DDR5
Technical Features: Uses double pumping for higher bandwidth without increasing clock frequency
Operates at 2.5V voltage compared to SDRAM's 3.3V
Maximum transfer rate is 1600 MB/s at 100MHz bus frequency
Modules consist of multiple chips organized in ranks
Module Specifications: Desktop DIMMs have 184 pins, notebook SO-DIMMs have 200 pins
Modules can be ×4, ×8, or ×16 configurations
Total capacity depends on number of chips and their sizes
Modules can be single-ranked or dual-ranked
Successor Evolution: DDR2 introduced higher clock frequencies and doubled throughput
DDR3 improved performance with doubled prefetch depth
DDR4 introduced 8n prefetch architecture in 2011
DDR5 released in 2020 with 1.1V operating voltage