A computers internal memory is what is used for the computer to store data to do with things like the operating system. These bits of internal memory are usually stored onto little microchips on the motherboard; the memory can vary from a couple of megabytes to several gigabytes.
Processor cache is something that is used by the internal memory, basically what this does is it has two levels, level one data is accessed by the processor as this is what the processor needs in order to do the instructions it is set, and level 2 cache, which is what holds a little bit of information that is stored on your hard drive, the reason it does this, is the computer predicts what you are going to do next and it tries to get that information before you need it to try and speed up the access times.
You don’t really need to know much about internal memory because of the fact that it is already built into the computer and there won’t be many times when you will need to take it out or replace it with a new one, which would be fairly difficult.
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