The DDR3 memory generation allows the data I/O speed to be eight times the memory clock speed because of its eight deep pre-fetch buffer feature. This enables the DDR3 memory to maintain transfer data at rates up to PC17000 when using a memory speed of 266 MHz. Virtium offers DDR3 SDRAMs in a wide range of form factors and features including SODIMM, MicroDIMM, Mini-DIMM, and LR-DIMM.
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The memory clock speed of DDR2 SDRAM was reduced by half compared to the DDR1 generation for a given bus speed. This change resulted in higher bus speed for an equivalent memory clock rate at the cost of increased latency. The operating voltage was reduced from 2.5 Volts to 1.8 volts to reduce power consumption and facilitate the use of smaller semiconductor fabrication processes.
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DDR SDRAM, which is also known as DDR1 SDRAM, became a JEDEC standard in 2000 and was the successor technology to SDRAM. It was followed by the subsequent generations of DDR2 and DDR3. DDR SDRAM provides a lower voltage level and higher data transfer compared to SDRAM.
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SDRAM became a JEDEC standard in 1993, and became the dominant memory generation by the year 2000. SDRAM was targeted at the 66 MHz and 100 MHz bus speeds available on PC motherboards at the time and was a successor technology to EDO DRAM.
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