What is Computer Memory?

• Memory can be categorized into a volatile memory or a non-volatile memory.
• Volatile memory stored the data temporarily wheres the non-volatile memory stores the data permanently.
•  Physical memory divided the memory storage are into pages.
• RAM is semiconductor-based memory where the CPU or the other hardware devices can write the data and read the same from it.
• ROM is the permanent data storage area.
• PROM stored the program permanently.
• EPROM used the ultra-violate rays to remove the program from the memory.
• EEPROM used the electrical charges to remove the program form the memory.
• Logical memory stores data in the form of files
• Virtual memory is part of the hard disk treated as a main memory.
• Process of copying th pages from the hard disk to the main memory is known as paging or swapping.
• Process of converting the virtual addresses into the real addresses is called mapping.
• Flash memories are the high-density devices that write data in chunks.
• RAM is the main memory. The Static RAM and the Dynamic RAM are its two types.
• Transistor is a semiconductor device that opens or closed a circuit for reading the data.
• SRAM used around four to six transistors for each memory cell.
• DRAM uses a pair of a transistor and a capacitor for each memory cell.
• EDO DRAM stats fetching the data from the next cell before the previous process completes.
• VRAM stored the images that are used to displayed on the computer screen.
• SDRAM synchronizes the memory speed with the CPU clock speed.
• RDRAM transfer the data at the maximum speed of 800 MHz.
• DDR-SDRAM transter data on both the edges of the clock signal that is on the rising and falling edges of the clock signal.
• Processor accesses the data from the RAM in a random order with the help of the memory cell address.
• Form factor is the size and shape of the memory packages.
• SIMM is a small circuit board designed to hold the memory chips.
• SIMM package is packed either in Small Outline J-Lead package or in Thin Small Outline package.
• DIMM package is a small circuit  board that contains the memory chips.
• SODIMM package is used in laptops and notebooks computers.
• Micro DIMM is smaller than DIMM and SODIMM packages.
• RDRAM package is used in the high bandwidth and the low latency applications.
• Size of the data bus of the memory, error checking and correcting modules, and the parity and non-parity of a chip are the characteristics of the memory.
• Installation of RAM depends on the amount of the memory required for the processing and the configuration of the motherboard.
• Memory of the system is upgraded either by changing the previous RAM or by adding one more RAM with the previous RAM.
• Troubleshooting methods are BIOS beep codes, Award BIOS beep codes, using PC Memory Diagnostic Software, and the AMI BIOS beep codes.