Almost every device has a computer within it, but very few people comprehend the ins and outs of how it operates. Even though numerous people can go their whole lives without knowing how they work, it can be a great idea to learn to understand the logic regarding how it works. There are a couple of core ideas that one must understand to be aware of how computers work, but overall they are rather simple in their core design philosophy.
The mind of the computer system is known as the central processing unit. The CPU processes information and holds levels of memory just like the brain in a human being. Today’s processors have multiple “cores” which are actually just multiple processors included in one unit. There are also several layers of cache memory integrated into the processor that act like a greater level of system RAM. To prevent from needing to reprocess information over and over again, the cache will hold frequently processed info to provide it much faster. The level 1 cache is the quickest but contains the least space, while the level 3 cache is the slowest but has the highest storage.
After the level 3 cache there is the system RAM, which is actually a separate component altogether. To read the information, a system will load a program when launched into the system’s RAM rather than reading it all from the hard drive. Even though loading to the RAM is where a lot of the wait time is spent when opening an application, without it, many different things would not be possible because things would be so slowly pulled from the hard drive. One of the bad parts about RAM is that once the power is taken from it all the memory inside is erased, and thus a hard drive is necessary.
The hard drive is straightforward: it is a device that permanently stores everything that is installed on one’s system. While the other bits of hardware are not necessary to make the system work, they typically provide a needed operation. The network card allows a PC to connect with a network of systems to share files or access the Internet. While most home systems have a simple Ethernet interface, data centers have particular interfaces such as a Cisco GLC-T and SFP transceiver modules to allow a system to do specific functions faster. In order to produce a sound and picture a video and sound card are needed. There is also the motherboard which consists of many connections and processors to do specific tasks and hook everything together.