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DDR SDRAM. Double Data Rate Synchronous Dynamic Random-Access Memory ( DDR SDRAM) is a double data rate (DDR) synchronous dynamic random-access memory (SDRAM) class of memory integrated circuits used in computers. DDR SDRAM, also retroactively called DDR1 SDRAM, has been superseded by DDR2 SDRAM, DDR3 SDRAM, DDR4 SDRAM and DDR5 SDRAM.
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.
(For example, if a computer has 2 GB (1024 3 B) of RAM and a 1 GB page file, the operating system has 3 GB total memory available to it.) When the system runs low on physical memory, it can " swap " portions of RAM to the paging file to make room for new data, as well as to read previously swapped information back into RAM.
Mac OS X 10.7 Lion if at least 2 GB RAM installed, ... The price of the Apple silicon Mac Mini dropped US$100 from that of the previous model to $699.
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 ...
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 ...
The gigabyte ( / ˈɡɪɡəbaɪt, ˈdʒɪɡəbaɪt /) [ 1] is a multiple of the unit byte for digital information. The prefix giga means 10 9 in the International System of Units (SI). Therefore, one gigabyte is one billion bytes. The unit symbol for the gigabyte is GB . This definition is used in all contexts of science (especially data ...
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