Memory(RAM)

RAM(Random access memory)

RAM: RAM which stand for random access memory works by taking data needed by the CPU from the secondary memory(Like a hard disk or SSD) and then the CPU takes the data that it needs from the RAM so that applications can be run. If there is not enough RAM in the computer the RAM will have to access the hard drive more often, this as a result will cause the computer to slow down. To stop this from happening the simple solution is to simply add more RAM to the computer system.  But unlike some other types memory RAM is volatile which means that when the power to the computer system is shut off all data on RAM will be lost.

DRAM: DRAM is where data is each bit of data is stored within a capacitor within a integrated circuit. The capacitors can either be discharged or charged to represent the two values of bits(0 or 1)

SIMM(single in-line memory module): This is a type of memory module containing RAM that was used during the 80's and 90's

DIMM(Dual in-lien memory module): Is bascially a double SIMM so just like a SIMM it is a type of memory module that contains RAM. This is used widely today and has bascially made SIMM obsolete.  

DRAM(Dyanmic ramdoom access memory): Is a type of RAM capacitors that has to have constant eletical charge running through in order to conitue to store the data.2 byte wide bus, 800mhz

SDRAM: Is a type of DRAM that has been sycronised with the proccessor. 8 byte wide bus, 1333mhz

DDR: Double data rate send double the amount of data when compared to non-DDR ram. 

DDR2: the improvements that DDR2 has made one DDR Is that is that it has high bus speeds and can basically double the bandwidth. Also when compared to DDR is that it has 240 pins compared to DDR 184 pins.

DDR3: Is a further improvement on DDR2 as it is able able to transfer data at twice the rate when compared to DDR2, this therefore gives it a highier bandwidth than DD2. But like DDR2 DDR3 also has 240 pins.
DDR4: Finally the most recent type of DDR RAM is DDR4. The basic improvements are the same as its predecessors which means DDR4 offer higher bandwidth the previous generations. Also when compared to DDR3 which has 240 pins DDR4 has a greater number of pins with a total of 288 pins. Also DDR4 has a lower power consumption rate when compared to DDR3.

ECC: Error correcting code: This detecets if the data was correctly processed by the memory modules and make correction if needed. ECC has 9 memory chips while non-ECC has 8. Used in server where data must be correct.