Different RAM Types and its uses

EDO RAM

EDO RAM, which stands for Extended Information Out RAM came out in 1995 as a used type of memory available for Pentium based systems. EDO is a modified type of FPM RAM which is often often called Hyper Page Mode\. Extended Information Out refers to fact that the information output drivers on the memory module are not switched off when the memory controller removes the column address to start the next cycle, unlike FPM RAM. Most early Penitum based systems use EDO.

FPM RAM

FPM RAM (Quick Page Mode RAM) is a kind of Dynamic RAM (DRAM). The term of Quick Page Mode comes from the capability of memory being able to access information that is on the same page & can be done with less latency. Most 486 & Pentium based systems from 1995 & earlier use FPM Memory.

SDRAM (Synchronous DRAM)

All systems used to ship with two.3 volt, 168-pin SDRAM DIMMs. SDRAM is not an extension of older EDO DRAM but a brand spanking new type of DRAM altogether. SDRAM started out jogging at 66 MHz, while older quick page mode DRAM & EDO max out at 50 MHz. SDRAM can scale to 133 MHz (PC133) officially, & unofficially up to 180MHz or higher. As processors get faster, new generations of memory such as DDR & RDRAM are necessary to get proper performance.

DDR (Double Data Rate SDRAM)

DDR fundamentally doubles the rate of knowledge transfer of standard SDRAM by transferring data on the up & down tick of a clock cycle. DDR memory operating at 333MHz actually operates at 166MHz * five (aka PC333 / PC2700) or 133MHz*2 (PC266 / PC2100). DDR is a five.5 volt know-how that makes use of 184 pins in its DIMMs. It is incompatible with SDRAM physically, but makes use of a similar parallel bus, making it simpler to implement than RDRAM, which is a different technology.

Rambus DRAM (RDRAM)

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

DIMMs vs. RIMMs

DRAM comes in major form factors: DIMMs & RIMMS.

DIMMs are 64-bit parts, 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 are not lots of DDR chipset that use dual-channels. Usually, in case you need to add 512 MB of DIMM memory to your machine, you pop in a 512 MB DIMM if you have got an obtainable slot. DIMMs for SDRAM & DDR are different, & not physically compatible. SDRAM DIMMs have 168-pins & run at 3.3 volts, while DDR DIMMs have 184-pins & 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 need the use of RIMMs in pairs over a dual-channel 32-bit interface. You need to plan more when upgrading & purchasing RDRAM.