Computer Hardware Components - Memory and Storage PDF

Computer Hardware Components Recall Memory Memory Memory Address  Memory Internal External (Primary...

Computer Hardware Components Recall Memory Memory Memory Address  Memory Internal External (Primary (Secondary Memory) Storage) Magnetic RAM ROM Optical Storage Flash Storage Storage Static RAM Dynamic RAM PROM Magnetic Tape Magnetic Disk CD Memory card Registers SDRAM EPROM HDD DVD Flash drive Cache DDR SDRAM EEPROM FDD BRD SSD DDR2 HVD Types of DDR3 Memory DDR4 RDRAM Internal Memory Internal Memory (Primary Memory) RAM Parameter SRAM DRAM Full form Static Random Access Memory Dynamic Random Access Memory Read/Write speed Faster Slower Storage component Uses transistor to store single bit of Uses separate capacitor to store data each bit of data Price Expensive Economical Power consumption More Less Refresh No need to refresh to maintain Needs periodically to maintain data data, i.e., thousands of time per second Used in Registers and cache Main memory Video: SRAM vs DRAM Types of RAM Registers – When the processor needs an instruction or data, it searches memory in this order: 1) L1 cache 2) L2 cache 3) L3 cache (if it exists) 4) RAM Delay is greater with each level of memory it must search. If the instruction or data is not found in primary memory, then it must search in secondary storage (e.g. hard disk or optical disc), which has a much slower speed. Memory Access Time Types of RAM Memory Modules ROM Video: Erasing data from EPROM External Memory External Memory (Secondary Storage) Writing Main Secondary Memory Storage Reading Storage Capacity Storage Access Time Hard Disk Video Solid-State Drive Flash Memory Storage Video: How SSD works Optical Discs Video: How optical discs work USB Flash Drives Video: How USB flash drive works Memory Cards Enterprise Storage Network Attached Storage (NAS) Storage Area Network (SAN) Source: https://www.liquidweb.com/blog/san-vs-nas/ Cloud Storage Video