What does DDR stand for in memory category?

DDR stands for Double Data Rate. Memories from this category transfer two data chunks per clock cycle. Translation: They achieve double the performance of memories without this feature running at the same clock rate (namely SDRAM memories, which are not available for PCs anymore).

How is DDR memory different from flash memory?

DDR is not flash memory like the kind that is used for Solid State Drives (SSDs), Secure Digital (SD) cards, or Universal Serial Bus (USB) drives. DDR memory is volatile, which means that it loses everything once power is removed.

What does DDR4 SDRAM stand for in computing?

Jump to navigation Jump to search. In computing, DDR4 SDRAM, an abbreviation for double data rate fourth-generation synchronous dynamic random-access memory, is a type of synchronous dynamic random-access memory (SDRAM) with a high bandwidth (“double data rate”) interface.

When did the development of DDR memory begin?

DDR memory transfers data to the processor on both the rising and falling edges of the clock signal. SDRAM was developed in 1988 in response to increased speed in other computer components. Previously, memory had to be asynchronous, that is, it operated independently of the processor.

Where is the resistive termination located on a DDR memory?

On DDR memories, the necessary resistive termination is located on the motherboard, while on DDR2 and DDR3 memories this termination is located inside the memory chips – a technique called ODT (On-Die Termination). This is done in order to make the signals “cleaner.” In Figure 5, you can see the signal that reaches the memory chip.

What kind of rating does DDR3 RAM have?

User rating, 4.8 out of 5 stars with 1427 reviews. User rating, 4.7 out of 5 stars with 124 reviews. User rating, 4.8 out of 5 stars with 656 reviews.

Which is the highest memory rate DDR2 or DDR3?

For example, DDR2-800 memories work at 400 MHz, DDR2-1066 and DDR3-1066 memories work at 533 MHz, DDR3-1333 memories work at 666.6 MHz, and so on. It is very important to understand that these clock rates are the maximum the memory can officially use.