Ddr how does it work

Figure 1: Clock signal and DDR mode. It is very important to understand that these clock rates are the maximum the memory can officially use. This happens because the clock signal is provided by the memory controller, a circuit that is located outside the memory in the north bridge chip from the motherboard or embedded inside the CPU, depending on the system.

This naming system DDRx-yyyy where x is the technology generation and yyyy is the DDR clock rate , in theory, is used only for the memory chips. The memory modules — the little printed circuit boards to where the memory chips are soldered — use a different naming system: PCx-zzzz, where x is the technology generation and zzzz is the maximum theoretical transfer rate a. This number tells us how many bytes can be transferred per second between the memory controller and the memory module, assuming that data will be transferred on every single clock pulse.

In some cases, the number is rounded off. In addition to a steady decrease in operating voltage and power consumption, DDR also became denser as more transistors were packed into a smaller area. As planned, DDR5 will provide double the bandwidth and density over DDR4, along with delivering improved channel efficiency. Having the capacity to expand the life of a notepad battery, […]. However, the latter is an umbrella name for RAM while the latter is a subcategory under […].

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