<blockquote><font class="small">Posté à l'origine par Simon:</font><hr />
C'est de la DDR /ubbthreads/http://forums.macg.co/vbulletin/images/smiliesold/wink.gif <hr /></blockquote>
Pour être plus précis
</font><blockquote><font class="small">Citer:</font><hr />
Memory enhancements
New Power Mac G4 systems use Double Data Rate synchronous dynamic random access memory, also know as DDR-SDRAM main memory. DDR-SDRAM allows the system to read and write data to and from memory on both the rising and falling edge of each clock cycle. This provides twice the throughput of single data rate SDRAM, which reads and writes only on the rising edge of the clock cycle. The resulting throughput between main memory and the system controller is up to 2.7GBps, more than double the throughput from the previous dual 1GHz Power Mac G4. DDR-SDRAM also increases systemwide memory bandwidth to the processors and all other elements of the system. At the same time, direct memory access allows system elements, such as a hard drive controller or a graphics processing unit, to send and receive data directly from main memory, without going through the processors. The added bandwidth allows system elements to function independently at high data rates, boosting total system performance.
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En gros le début en traduction, la DDR permet d'écrire et de lire les infos de la mémoire sur les deux "côtés" d'un cycle d'horloge, c-à-d que l'on peut lire et écrire à la phase ascendante et à la phase descente. Ce qui n'était pas le cas avant. On arrive donc à un chiffre de 2.7Gb par seconde en taux de transfert /ubbthreads/http://forums.macg.co/vbulletin/images/smiliesold/laugh.gif