Jun 22 2007, 03:02 PM, updated 19y ago
What is DDR3?
DDR3 SDRAM or double-data-rate three synchronous dynamic random access memory is the name of the new DDR memory standard that has been developed as the successor to DDR2 SDRAM.
The memory comes with a promise of a power consumption reduction of 40% compared to current commercial DDR2 modules, due to DDR3's 90 nm fabrication technology, allowing for lower operating currents and voltages (1.5 V, compared to DDR2's 1.8 V or DDR's 2.5 V). "Dual-gate" transistors will be used to reduce leakage of current.
DDR3's prefetch buffer width is 8 bit, whereas DDR2's is 4 bit, and DDR's is 2 bit.
Theoretically, these modules could transfer data at the effective clockrate of 800-1600MHz (for a single clock bandwidth of 400-800MHz), compared to DDR2's current range of 400-1066 MHz (200-533 MHz) or DDR's range of 200-600 MHz (100-300 MHz). To date, such bandwidth requirements have been mainly on the graphics market, where fast transfer of information between framebuffers is required.
Prototypes were announced in early 2005, while the DDR3 specification is expected to be publicly available in mid-2007. Supposedly, Intel has preliminarily announced that they expect to be able to offer support for it in mid 2007 with a version of their upcoming Bearlake chipset. AMD's roadmap indicates their own adoption of DDR3 to come in 2008.
DDR3 DIMMs have 240 pins, the same number as DDR2; however, the DIMMs are physically incompatible, owing to a different key notch location. [1]
Features From new generation ram
DDR3 SDRAM Components:
Introduction of asynchronous RESET pin
Support of system level flight time compensation
On-DIMM Mirror friendly DRAM ballout
Introduction of CWL (CAS Write Latency) per speed bin
On-die IO calibration engine
READ and WRITE calibration
DDR3 Modules:
Fly-by command/address/control bus with On-DIMM termination
High precision calibration resistors
Advantages compared to DDR2
Higher bandwidth (up to 1600 MHz)
Performance increase at low power
Longer battery life in laptops
Enhanced low power features and thermal design
Disadvantages compared to DDR2
Commonly higher CAS Latency
Lower MFIBS per Quad Cycle
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You can find out more comparison and performances about DDR3 in here:
AnandTech DDR3 vs DDR2
http://www.anandtech.com/memory/showdoc.aspx?i=2989
Simmtester
http://www.simmtester.com/page/news/showpubnews.asp?num=145
Tomshardware
http://www.tomshardware.com/2007/06/05/pip...oards_compared/
Legit Reviews
http://www.legitreviews.com/article/501/1/
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Factory that ready to rock!:
OCZ DDR3
http://www.ocztechnology.com/products/ddr3/
Qimonda DDR3
http://www.qimonda.com/computing-dram/ddr3/index.html
Corsair DDR3 & Reviews (The XMS using Dominator Heat Spreader
)http://www.bit-tech.net/hardware/2007/05/2...024_1333c9dhx/1
Geil DDR3 with Review
http://www.ocworkbench.com/2007/GEIL/DDR3-1066/g1.htm
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Built-In DDR3(Currently only one motherboard using
)Asus P5K3 Premium
Built in 2 GB of DDR3 rated at 1333MHz,can be overclocked to 1600MHz,it uses Qimonda Chipset,size is only 3 quarter of a real DDR3!!!!
http://www.hexus.net/content/item.php?item=8974
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Before You wanna get yourself a DDR3,Please read this:
When is the mainstream for DDR3?
http://www.extremetech.com/article2/0,1697,2115031,00.asp
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LYN member,if my informations are not enough,please come here and contribute your knowledge and make this topic become hot cake!
Regards
AceCombat
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