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In February 2005, Samsung demonstrated the first DDR3 memory prototype, with a capacity of 512 Mb and a bandwidth of 1.066 Gbps. [2] Products in the form of motherboards appeared on the market in June 2007 [14] based on Intel's P35 "Bearlake" chipset with DIMMs at bandwidths up to DDR3-1600 (PC3-12800). [15]
With data being transferred 64 bits at a time, DDR SDRAM gives a transfer rate (in bytes/s) of (memory bus clock rate) × 2 (for dual rate) × 64 (number of bits transferred) / 8 (number of bits/byte). Thus, with a bus frequency of 100 MHz, DDR SDRAM gives a maximum transfer rate of 1600 MB/s.
DDR SDRAM operating with a 100 MHz clock is called DDR-200 (after its 200 MT/s data transfer rate), and a 64-bit (8-byte) wide DIMM operated at that data rate is called PC-1600, after its 1600 MB/s peak (theoretical) bandwidth. Likewise, 12.8 GB/s transfer rate DDR3-1600 is called PC3-12800. Some examples of popular designations of DDR modules:
Initial clock rates were 400 and 533 MHz, which are described as DDR3-800 and DDR3-1066 (PC3-6400 and PC3-8500 modules), but 667 and 800 MHz, described as DDR3-1333 and DDR3-1600 (PC3-10600 and PC3-12800 modules) are now common. [14] Performance up to DDR3-2800 (PC3 22400 modules) are available. [15]
FPM, EDO, SDR, and RDRAM memory was not commonly installed in a dual-channel configuration. DDR and DDR2 memory is usually installed in single- or dual-channel configuration. DDR3 memory is installed in single-, dual-, tri-, and quad-channel configurations. Bit rates of multi-channel configurations are the product of the module bit-rate (given ...
Expandable to 16 GB 1,600 MHz PC3-12800 DDR3 SDRAM [90] [91] 1,600 MHz PC3-12800 1.35 V DDR3 SDRAM [92] Graphics: Nvidia GeForce 9400M with 256 MB DDR3 SDRAM shared with main memory and Nvidia GeForce 9600M GT with 256 MB GDDR3 SDRAM Can switch between the two (but cannot use both) Nvidia GeForce 9400M with 256 MB DDR3 SDRAM shared with main memory
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