Trigun
26-02-2004, 22:38
Encontrei esta preview da memoria DDR-II
Pontos + importantes:
That's the essence of DDR-II. Here's it layed out simply.
DDR : 100MHz driven clock -> 100MHz data buffers -> DDR applied -> 200MHz final data frequency
DDR-II: 100MHz driven clock -> 200MHz data buffers -> DDR applied -> 400MHz final data frequency
The rumours of DDR-II being backwards compatible with DDR in the electrical and packaging senses are false. DDR-II now requires more pins on the modules, despite sharing the same bus width per DIMM as DDR (64-bit/8-byte) and the signalling and DRAM voltage requirement of 1.8V (although some current DDR DRAMs run at 1.8V too, depending on manufacturer, DIMM and DRAM lineage) make the new standard wholly incompatible with the old.
DDR-II will be cheaper to make, will consume less power and give off less heat, but it will also suffer from access latency issues and the usual problems with transitioning to a new memory format, especially since it doesn't fit in the same slots as before.
Preview DDR-II na Hexus.net: http://www.hexus.net/content/reviews/review.php?dXJsX3Jldmlld19JRD03MDImdXJsX2hpc3Rvcnk 9LTI
Pontos + importantes:
That's the essence of DDR-II. Here's it layed out simply.
DDR : 100MHz driven clock -> 100MHz data buffers -> DDR applied -> 200MHz final data frequency
DDR-II: 100MHz driven clock -> 200MHz data buffers -> DDR applied -> 400MHz final data frequency
The rumours of DDR-II being backwards compatible with DDR in the electrical and packaging senses are false. DDR-II now requires more pins on the modules, despite sharing the same bus width per DIMM as DDR (64-bit/8-byte) and the signalling and DRAM voltage requirement of 1.8V (although some current DDR DRAMs run at 1.8V too, depending on manufacturer, DIMM and DRAM lineage) make the new standard wholly incompatible with the old.
DDR-II will be cheaper to make, will consume less power and give off less heat, but it will also suffer from access latency issues and the usual problems with transitioning to a new memory format, especially since it doesn't fit in the same slots as before.
Preview DDR-II na Hexus.net: http://www.hexus.net/content/reviews/review.php?dXJsX3Jldmlld19JRD03MDImdXJsX2hpc3Rvcnk 9LTI