DDRDDR MEMORYMEMORY

NEW TCEHNOLOGYNEW TCEHNOLOGY BANDWIDTHBANDWIDTH SREVERS , WORKSTATION SREVERS , WORKSTATION NEXT GENERATION OF SDRAMNEXT GENERATION OF SDRAM

DDR2 MEMORYDDR2 MEMORY

FASTER SPEEDSFASTER SPEEDS HIGHER DATA BANDWITHSHIGHER DATA BANDWITHS LOWER POWER CONSUMPTIONLOWER POWER CONSUMPTION ENHANCED THERMAL PERFORMANCEENHANCED THERMAL PERFORMANCE DESKTOPS , SERVERS , NOTEBOOKSDESKTOPS , SERVERS , NOTEBOOKS

PERFORMANCE OF MEMORYPERFORMANCE OF MEMORY

SPEED = WIDTH * FREQUENCYSPEED = WIDTH * FREQUENCY

SPEED = MEMORY PERFORMANCE ( Mb/s)SPEED = MEMORY PERFORMANCE ( Mb/s)

WIDTH = MEMORY BUS (bits)WIDTH = MEMORY BUS (bits)

FREQUENCY = FREQUENCY OF DATA (MHz) FREQUENCY = FREQUENCY OF DATA (MHz)

DDR2 versus DDR ModulesDDR2 versus DDR Modules

Feature DDR DDR2 DDR2 Advantage

MemoryPackage

TSOP and BGA FBGA onlyHigher speed and improved electrical and thermal p

erformance

On DieTermination

Memory signal terminated on motherboard

In  chipTerminates memory signal in every chip to improve

signal and integrity

Voltage 2.5 volts 1.8 Volts Lower power consumption and heat dissipation

Memory Chip Size

128Mb - 1Gb256Mb-

4Gb*1Gb chip -> 2GB DIMM (no chip stacking)

4Gb chip -> 8GB DIMM (no chip stacking)

Frequency 200, 266, 333, 400 Mhz400, 533,

667Speed above 400MHz

ModuleBandwidth

Up to 6.4GB/s Dual ChannelUp to

10.6GB/s Highest memory performance

Next Generation of MemoryNext Generation of Memory

DDR: supply voltage VDD = 2.5 DDR: supply voltage VDD = 2.5 VV DDR-2: supply voltage VDD = 1.8 DDR-2: supply voltage VDD = 1.8 VV DDR-3: supply voltage VDD not yet standardizedDDR-3: supply voltage VDD not yet standardized