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Memory based on MOS transistors, was developed in the late 1960s and was the basis for all early commercial semiconductor memory. The first commercial DRAM IC chip, the 1K Intel 1103, was introduced in October 1970. Synchronous dynamic random-access memory (SDRAM) later debuted with the Samsung KM48SL2000 chip in 1992.
Double Data Rate 4 Synchronous Dynamic Random-Access Memory ( DDR4 SDRAM) is a type of synchronous dynamic random-access memory with a high bandwidth ("double data rate") interface. Released to the market in 2014, [ 2][ 3][ 4] it is a variant of dynamic random-access memory (DRAM), some of which have been in use since the early 1970s, [ 5] and ...
DDR3 SDRAM. Double Data Rate 3 Synchronous Dynamic Random-Access Memory ( DDR3 SDRAM) is a type of synchronous dynamic random-access memory (SDRAM) with a high bandwidth ("double data rate") interface, and has been in use since 2007. It is the higher-speed successor to DDR and DDR2 and predecessor to DDR4 synchronous dynamic random-access ...
Both models come in configurations of 64 GB storage / 4 GB RAM, 128/4, and 128/6. The 5G model also comes with a 128/8 configuration. Both phones come with expandable storage, LTE and 5G international models using a dedicated microSDXC card slot, and the 5G USA's microSDXC using a sharedSIM slot.
DDR2 SDRAM. Double Data Rate 2 Synchronous Dynamic Random-Access Memory ( DDR2 SDRAM) is a double data rate (DDR) synchronous dynamic random-access memory (SDRAM) interface. It is a JEDEC standard (JESD79-2); first published in September 2003. [ 2] DDR2 succeeded the original DDR SDRAM specification, and was itself succeeded by DDR3 SDRAM in 2007.
v. t. e. Low-Power Double Data Rate ( LPDDR ), also known as LPDDR SDRAM, is a type of synchronous dynamic random-access memory that consumes less power and is targeted for mobile computers and devices such as mobile phones. Older variants are also known as Mobile DDR, and abbreviated as mDDR. Modern LPDDR SDRAM is distinct from DDR SDRAM, with ...
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