Synchronous Dynamic Random Access Memory (SDRAM) is a type of computer memory that is basically an upgrade of the standard DRAM. It retrieves data alternately between two memory groups, eliminating unnecessary delays. It is synchronized with the speed of the computer clock and optimized for the CPU bus speed of the computer. It also provides support to high bus speeds commonly found in high-end computers.
Types of SDRAMs
Kinds of SDRAMs include the following:
Clock circuitry types
Two-clock SDRAM
A two-clock SDRAM interacts with two chips per clock cycle. It has the same features as the four-clock model.
Four-clock SDRAM
A four-clock SDRAM interacts with four chips per clock cycle. It is commonly used in most motherboards.
Frequency types
PC100 SDRAM
A PC100 SDRAM has a memory that can run on a frequency of 100 MHZ.
PC133 SDRAM
A PC133 SDRAM has a memory that can run on a frequency of 133 MHz.
Choosing SDRAMs (Buying tips)
Speed and compatibility: Choose an SDRAM with a high speed rating compatible with its frequency counterpart. For example, if you want to get an SDRAM with a 10 nanosecond rating, it should be used with an 83 MHz system.
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