Mer om DDR2

<img src="http://www.sweclockers.com/img/ico_note.gif" alt="Nyhet"><b class="red">Mer om DDR2</b> <small class="small">Onsdag den 25 Februari 2004 Bjorn<br /></small>
<a href="http://www.anandtech.com/memory/showdoc.html?i=1977" target="_blank">Anandtech</a> har lite information om DDR2-standarden, skillnader mellan DDR1 och DDR2 och hur den nya tekniken kommer att utvecklas och prestera under de närmsta månaderna. Skillnaden mellan teknikerna verkar vara att DDR2 har en prefetch på 4 bit där DDR1 har 2 bit. Anandtech förklarar: "<i>DDR2 gets the majority of its punch from the 4 bit prefetch. DDR2 can effectively write/read four times the amount of data per clock cycle to/from the memory array. This effectively doubles the data bus speed while keeping the internal bus speed the same from DDR1. Both DDR1 and DDR2 use a 64-bit interface.</i>".<br /><br />[...]<br /><br /><i>What does this mean for early adopters? Essentially; nothing. There will not be a performance increase between DDR2-400 and DDR-400 (or even between DDR2-533 and DDR-533). DDR2 is the technology to enable post-DDR533 speeds, rather than a technology to enhance it. As we start to see benchmarks of DDR1 versus DDR2 trickle in, consider the maturity of the two technologies. DDR1 is nearly 5 years old with dozens of chipset manufacturers and billions of dollars in financial backing. DDR2 still has not even entered full production yet.</i><p>
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