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| Outlook of DDR3 RAMs |
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| Fan Cooled DDR3 RAMs |
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| Non-Fan Cooled RAMs. |
Strictly speaking, modern types of DRAM are not random access, as data is read in bursts, although the name DRAM / RAM has stuck.
However, many types of SRAM, ROM, OTP, and NOR flash are still random access even in a strict sense.
The first RAM modules to come into the market were created in 1951 and were sold until the late 1960s and early 1970s.
The main memory (the "RAM") in personal computers is dynamic RAM (DRAM).
Types of Memory used in Computers
- DDR : Double data rate synchronous dynamic random-access memory (DDR SDRAM) is a class of memory integrated circuits used in computers. DDR SDRAM (sometimes referred to as DDR1 SDRAM) has been superseded by DDR2 SDRAM and DDR3 SDRAM, neither of which are either forward or backward compatible with DDR SDRAM, meaning that DDR2 or DDR3 memory modules will not work in DDR equipped motherboards, and vice versa.
- DDR2 : DDR2 SDRAM is a double data rate synchronous dynamic random-access memory interface. It supersedes the original DDR SDRAM specification and has itself been superseded by DDR3 SDRAM. DDR2 is neither forward nor backward compatible with either DDR or DDR3.
- DDR3 : In computing, DDR3 SDRAM, an abbreviation for double data rate type three synchronous dynamic random access memory, is a modern kind of dynamic random access memory (DRAM) with a high bandwidth interface. It is one of several variants of DRAM and associated interface techniques used since the early 1970s. DDR3 SDRAM is neither forward nor backward compatible with any earlier type of random access memory (RAM) due to different signaling voltages, timings, and other factors.
- DDR4 : In computing, DDR4 SDRAM, an abbreviation for double data rate type four synchronous dynamic random-access memory, is a type of dynamic random-access memory (DRAM) with a high bandwidth interface currently under development and expected to be released to market in 2014.As a "next generation" successor to DDR3 SDRAM, it is one of several variants of DRAM which have been in use since the early 1970s.It is not directly compatible with any earlier type of random access memory (RAM) due to different signaling voltages, timings, physical interface, and other factors.
Types of Memory used in "Graphic Cards"
GDDR : GDDR or Graphic Double Data Rate memory refers to memory specifically designed for use on graphics cards. GDDR is distinct from the more widely known DDR SDRAM types such as DDR3, although they share some technologies - including double data rate design - in common. Currently, the following generations of GDDR exist, with the higher number indicating the more recent specifications.
GDDR2
GDDR3
GDDR4
GDDR5