DDR RAM question

[The mighty moose]

Could someone please explain how DDR RAM functions with reference to the system clock cycle? 

PLEASE 

THx<3:)

[Zach's Tech Tips]

Whats a clock cycle?

[The mighty moose]

I don't know ;__;

[Deknoid]

The DDR RAM is based on the same framework like that of the Synchronous Dynamic RAM, but with the only difference being that with reference to the system clock cycle, the DDR RAM transfers twice the data in the same amount per clock cycle, thus making it essentially twice as fast as the SDRAM.

[Sauron]

I think you're confusing different things here... ram has a maximum frequency (which thanks to double data rate gets effectively doubled) of data transfer. When it's ready the cpu can request some data and store it in the cache. If the ram is not yet ready, the cpu must wait until it is. Usually the cpu doesn't need new data every clock cycle and therefore ram speed is not a bottleneck in most scenarios.