Thread: Types of RAM

The following are some general types of RAM:

• SRAM: SRAM is termed as Static random access memory which makes use of many transistors, usually four to six, for each memory cell but doesn't have a capacitor in each cell. It is used mainly for cache.

• DRAM: The DRAM is termed as Dynamic random access memory has memory cells with a corresponding transistor and capacitor which need to repeatedly refresh.

• FPM DRAM: The FPM DRAM is termed as Fast page mode dynamic random access memory which was the unique appearance of DRAM. It remains through the entire procedure of establishing a bit of records by column and row and then analysis the bit prior to it starts on the next bit. The highest transfer rate is L2 cache is just about 176 MBps.

• EDO DRAM: The EDO DRAM is termed as Extended data-out dynamic random access memory which does not remain for all of the processing of the first bit before ongoing to the next one. As soon as the address of the first bit is positioned, EDO DRAM starts on searching for the next bit. It is regarding five percent quicker than FPM. The highest transfer rate to L2 cache is just about 264 MBps.

• SDRAM: The SDRAM is termed as Synchronous dynamic random access memory which obtains benefit of the burst mode conception to significantly progress presentation. It does this by waiting on the row containing the demanded bit and affecting quickly through the columns, analysis each bit as it goes. The idea is that most of the time the data needed by the CPU will be in series. SDRAM is about five percent quicker than EDO RAM and is frequently used in today’s desktops computer. The higher transfer rate to L2 cache is just about 528 MBps.

• DDR SDRAM: The DDR SDRAM is termed as Double data rate synchronous dynamic RAM is presently like SDRAM apart from that it has advanced bandwidth, as significant to better speed. The higher transfer rate to L2 cache is just about 1,064 MBps (for DDR SDRAM 133 MHZ).

• RDRAM: The RDRAM is termed as Rambus dynamic random access memory which is an essential exit from the previous DRAM structural design. Intended by Rambus, RDRAM uses a Rambus in-line memory module (RIMM), which is identical in size and also in pin configuration to a normal DIMM. What makes RDRAM so unusual is its use of a unique high-speed data bus called the Rambus channel. RDRAM memory chips operate in similar way to get a data rate of 800 MHz, or 1,600 MBps. Since they function at such high speeds, they produce much more heat than other kinds of chips. To help disperse the surplus heat Rambus chips are fixed with a heat spreader, which looks like a long thin wafer. Just like there are minor editions of DIMMs, there are also SO-RIMMs, intended for notebook computers.

• Credit Card Memory: The Credit card memory is a proprietary self-reliant DRAM memory unit that plug up into a unique slot for use in notebook computers.

• PCMCIA Memory Card: One more self-sufficient DRAM module for notebooks, cards of this kind and work with every notebook computer system and if the bus matches with the memory card's bus speed.

• CMOS RAM: CMOS RAM is a term for the minute quantity of memory used by your computer and some other devices to memorize things like hard disk location for details. This memory uses a little battery to make available it with the power it needs to continue the memory contents.

• VRAM: The VRAM is termed as VideoRAM, which is mostly known as Multiport dynamic random access memory (MPDRAM), which is a form of RAM used exclusively for video adapters or 3-D accelerators. The "multiport" part appears from the fact that VRAM generally has two self-sufficient access ports instead of one, agreeing the CPU and graphics processor to admittance the RAM at the same time. VRAM is situated on the graphics card and comes in a range of design, many of which are proprietary. The amount of VRAM is a influential aspect in the resolution and color intensity of the display. VRAM is also utilized to seize graphics-specific details such as 3-D geometry statistics and quality maps. True multiport VRAM be likely to be costly, so nowadays, numerous graphics cards use SGRAM which is termed as Synchronous Graphics RAM instead of VRAM. Performance is just about identical, but SGRAM is not very costly as compared to VRAM.