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OBJ-3.2: Virtual memory is an area on the hard disk allocated to contain pages of memory. When the operating system doesn’t have sufficient physical memory (RAM) to perform a task, pages of memory are swapped to the paging file. This frees physical RAM to enable the task to be completed. When the paged RAM is needed again, it is re-read into memory. VRAM (video RAM) refers to any type of random access memory (RAM) specifically used to store image data for a computer display. A small outline dual inline memory module (SODIMM) can be purchased in various types and sizes to fit any laptop, router, or other small form factor computing device. Error checking and correcting or error correcting code (ECC) is a type of system memory that has built-in error correction security. ECC is more expensive than normal memory and requires support from the motherboard. ECC is commonly used in production servers and not in standard desktops or laptops.

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