Explain different types of ram

Answer 1

SDRAM (Synchronous DRAM)

Almost all systems used to ship with 3.3 volt, 168-pin SDRAM DIMMs. SDRAM is not an extension of older EDO DRAM but a new type of DRAM altogether. SDRAM started out running at 66 MHz, while older fast page mode DRAM and EDO max out at 50 MHz. SDRAM is able to scale to 133 MHz (PC133) officially, and unofficially up to 180MHz or higher. As processors get faster, new generations of memory such as DDR and RDRAM are required to get proper performance.

DDR (Double Data Rate SDRAM)

DDR basically doubles the rate of data transfer of standard SDRAM by transferring data on the up and down tick of a clock cycle. DDR memory operating at 333MHz actually operates at 166MHz * 2 (aka PC333 / PC2700) or 133MHz*2 (PC266 / PC2100). DDR is a 2.5 volt technology that uses 184 pins in its DIMMs. It is incompatible with SDRAM physically, but uses a similar parallel bus, making it easier to implement than RDRAM, which is a different technology.

Rambus DRAM (RDRAM)

Despite it's higher price, Intel has given RDRAM it's blessing for the consumer market, and it will be the sole choice of memory for Intel's Pentium 4. RDRAM is a serial memory technology that arrived in three flavors, PC600, PC700, and PC800. PC800 RDRAM has double the maximum throughput of old PC100 SDRAM, but a higher latency. RDRAM designs with multiple channels, such as those in Pentium 4 motherboards, are currently at the top of the heap in memory throughput, especially when paired with PC1066 RDRAM memory.

DIMMs vs. RIMMs

DRAM comes in two major form factors: DIMMs and RIMMS.

DIMMs are 64-bit components, but if used in a motherboard with a dual-channel configuration (like with an Nvidia nForce chipset) you must pair them to get maximum performance. So far there aren't many DDR chipset that use dual-channels. Typically, if you want to add 512 MB of DIMM memory to your machine, you just pop in a 512 MB DIMM if you've got an available slot. DIMMs for SDRAM and DDR are different, and not physically compatible. SDRAM DIMMs have 168-pins and run at 3.3 volts, while DDR DIMMs have 184-pins and run at 2.5 volts.

RIMMs use only a 16-bit interface but run at higher speeds than DDR. To get maximum performance, Intel RDRAM chipsets require the use of RIMMs in pairs over a dual-channel 32-bit interface. You have to plan more when upgrading and purchasing RDRAM.

Answer 2

RAM (Random Access Memory) is the place where unsaved data is processed.

'Random Access', means that you can randomly access any memory location without having to pass through many places, unlike a tape.

Although this method applies to other forms of memory, the term 'RAM' is reserved for the temporary working memory of a computer, which is volatile.

'Volatile' means that it requires power to hold the data. When you remove the power the memory is cleared.

Different RAM is for different computer models. As improvements are made in technology, the RAM for computers is improved.

The RAM is held in modules, which are plugged into the motherboard, so they can be added to, or changed.

The mini circuit boards hold the memory chips. The boards have connections on both sides of the board edge and are called DIMM. (Dual In-line Memory Modules.)

It's a bit of a minefield getting the right module for the job. Check the specifications for your motherboard.

There are different voltages. Early memory needed 5volts, later ones 3.3v and 1.5v memories are used, some were dual standard.

Modern memory chips use DDR, Double Data Date. This processes information on both the positive and negative change in the clock pulse, and therefore works faster.

There are different versions of DDR. DDR2, DDR3 etc.

The sockets on the motherboard have a locating pin which prevents the wrong sort being fitted.

Laptops use a smaller shape of memory module. A Small Outline Dual In-line Memory Modules. (SODIMM)

Answer 3

There are 2 types of RAM's:

1.Static ram(sram)

2.Dynamic ram(dram)

There are some difference between them: 1.sram are faster than dram 2.sram are mostly made of bjt's were dram's are made of mosfet's

Answer 4

two type of ram static or dynamic