items to be read orwritten in almost the same amount of time irrespectiveof the physical location of data inside the memory. Incontrast, with other direct-access data storage mediasuch as hard disks, CD-RWs, DVD-RWs and the older magnetic tapes and drum memory, the time required to read and write data items varies signifcantly depending on their physical locations on therecording medium, due to mechanical limitations such as media rotation speeds and arm movement.
Characteristics:RAM chips are widely used in the normal operations of a computer for starting and loading the operating system and applications. Much faster to read from and writeData in RAM stays there until the computer is runningA RAM chip allows you to store multiple gigabytes (GB) of data.A 32 bit PC can have a maximum of 4 GB of RAM while a 64 bit PC can have 16 exabytes of RAMFunction:A computer's Random Access Memory stores data for short-term use. RAM works in conjunction with the hard drive, which takes care of long-term storage, to provide quick access to fles that the computer is actively reading or writing. Unlike hard drive memory, however, program data stored in RAM is erased when you reboot the computer or when another program needs the space for its ownuse.Types:1.DRAM -Dynamic RAM must be continuously refreshed, or otherwise, all contents are lost.2.SRAM - Static RAM is faster, needs less power but is more expensive. However, it does need to berefreshed like DRAM.3.Synchronous Dynamic RAM (SDRAM) - This type of RAM can run at very high clock speeds.4.DDR - Double Data Rate provide synchronous Random Access MemoryLatest Technology:DDR4 RAM, which is short for "double data rate fourth generation random access memory", is the latest internal computing update engineered to boost performance. This memory upgrade promises faster, more efficient performance. DDR4 technology has two predecessors, DDR3 and DDR2.Power SupplyApower supplyis an electrical device that supplieselectricpowerto anelectrical load. The primary function of a power supplyis to convertelectric currentfrom a source to thecorrectvoltage,current, andfrequencyto power the load. As aresult, power supplies are sometimes referred to aselectric powerconverters. Some power supplies are separate standalone pieces ofequipment, while others are built into the load appliances that they power. Examples of the latter include power supplies found indesktop computersandconsumer electronicsdevices. Other functions that power supplies may perform include limiting the current drawn by the load to safe levels, shutting off the current in the event of anelectrical fault, power conditioning to preventelectronic noiseorvoltage surgeson the input from reaching the load,power-factor correction, and storing energy so it can continue to power the load in the event of a temporary interruption in the source power (uninterruptible power supply).Characteristics