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PC2-5300 DDR2 SO-DIMM (for notebooks) Comparison of memory modules for desktop PCs (DIMM) Comparison of memory modules for portable/mobile PCs (SO-DIMM) The key difference between DDR2 and DDR SDRAM is the increase in prefetch length. In DDR SDRAM, the prefetch length was two bits for every bit in a word; whereas it is four bits in DDR2 SDRAM.
DDR: 1998; 26 years ago () DDR2: 2003; ... A test with DDR and DDR2 RAM in 2005 found ... In January 2009, 1 GB DDR1 was 2–3 times more expensive than 1 GB DDR2.
The CPU is an Intel Atom N270 @ 1.6 GHz, and the standard model came with 1 GB DDR2 RAM occupying the single memory slot. The 160 GB Hard Disk Drive had Microsoft Windows XP Home pre-installed. Also standard are the 6-cell battery, the 1.3M pixel webcam and integrated microphone, and both Ethernet and Wi-Fi 802.11 b/g network connections.
Corresponding 240-pin DIMMs are known as PC2-3200 through PC2-6400. DDR2 SDRAM is now available at a clock rate of 533 MHz generally described as DDR2-1066 and the corresponding DIMMs are known as PC2-8500 (also named PC2-8600 depending on the manufacturer). Performance up to DDR2-1250 (PC2-10000) is available.
The desktop contained an AMD Athlon II X4 640 processor, 4 GB of DDR3 RAM, a 500 GB hard disk drive, and ATI Radeon HD 3000 discrete graphics. [27] The desktop was indicated by Lenovo to be "multi-monitor friendly", with the capacity to power two displays even with the basic configuration. [ 27 ]
FB-DIMM DDR2 vs DIMM DDR2. Fully buffered DIMM architecture introduces an advanced memory buffer (AMB) between the memory controller and the memory module. Unlike the parallel bus architecture of traditional DRAMs, an FB-DIMM has a serial interface between the memory controller and the AMB. This enables an increase to the width of the memory ...
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51.2 GB/s DDR SDRAM uses double-data-rate signalling only on the data lines. Address and control signals are still sent to the DRAM once per clock cycle (to be precise, on the rising edge of the clock), and timing parameters such as CAS latency are specified in clock cycles.