Memory is temparary storage that computers use.
When you turn off your computer, all RAM is erased.
When you turn off your computer, all RAM is erased.
Generally, the more memory (RAM) you have, the faster your computer will be.
Types of RAM
SRAM: Static random access memory uses multiple transistors, typically four to six, for each memory cell but doesn't have a capacitor in each cell. It is used primarily for cache.
DRAM: Dynamic random access memory has memory cells with a paired transistor and capacitor requiring constant refreshing.
DRAM: Dynamic random access memory has memory cells with a paired transistor and capacitor requiring constant refreshing.
Types of DRAM
FPM DRAM - Fast Page Mode DRAM - FPM DRAM is only slightly faster than regular DRAM. This used to be the main type of memory used in PCs but was eventually replaced by EDO RAM, due to its slow speed. FPM DRAM, is now considered to be obsolete. It was mainly used in the older 386 and 486 computers. It is not suitable for memory buses over 66 MHz.
EDO DRAM - Extended Data Out DRAM - EDO DRAM provided a better performance increase over FPM DRAM. EDO RAM cannot operate on a bus speed faster than 66MHz. With a need for speed, BEDO DRAM was introduced.
BEDO DRAM - Burst EDO DRAM - Burst EDO DRAM is a type of EDO DRAM that can process four memory addresses in one burst. BEDO DRAM can only stay synchronized with the CPU clock for short periods (bursts). It is faster than it's predecessor, EDO DRAM.
SDRAM - Synchronous DRAM - Short for Synchronous DRAM, a type of DRAM that can run at much higher clock speeds than conventional memory. SDRAM actually synchronizes itself with the CPU's bus. SDRAM is the new memory standard for modern PCs.
NOTE: When looking at SDRAM The number following "PC" indicates the speed of the system's frontside bus. (example: The PC100 SDRAM is designed for systems equipped with a 100 MHz frontside bus.)
RDRAM - Rambus DRAM - Short for Rambus DRAM, a type of memory (DRAM) developed by Rambus, Inc. Whereas the fastest current memory technologies used by PCs (SDRAM) can deliver data at a maximum speed of about 100 MHz, RDRAM transfers data at up to 800 MHz. RDRAM (and DDR-SDRAM) are the two technologies expected to replace SDRAM.
DDR SDRAM - Double Data Rate - Short for Double Data Rate-Synchronous DRAM, a type of SDRAM that supports data transfers on both edges of each clock cycle (the rising and falling edges), effectively doubling the memory chip's data throughput. DDR-SDRAM also consumes less power, which makes it well-suited to notebook computers. DDR-SDRAM is also called SDRAM II. and DDRAM. DDR-SDRAM and RDRAM are the two technologies expected to replace SDRAM.
NOTE: When looking at DDR memory, the number following "PC" indicates the module's total bandwidth. (example: PC1600 DDR memory is designed for systems equipped with a 100 MHz frontside bus. The number 1600' refers to the module's bandwidth; the quantity of data that it transfers in one second, of 1.6 GB per second.
DDR2 SDRAM - DDR2 SDRAM is the next step up from DDR SDRAM. DDR2 SDRAM offers new features and functions that enable higher clock and data rate operations. DDR2 transfers 64 bits of data twice every clock cycle. DDR2 SDRAM memory is not compatible with current DDR SDRAM memory slots.
