Russ Smith said:
OK this is probably really dumb but at a family dinner friday night my sister's boyfriend mentioned he'd sped up his computer by adding memory. I asked him why that works and he said he wasn't really sure, but it does.
Why does adding more RAM make the system faster, or does it? Considering doing it with girlfriend's laptop.
Windows has a paging file on the hard disk. It is a temporary storage file the system uses to store information it needs to operate the various systems and programs. The same information is stored in system memory (RAM) but the system memory is 'in use'.
To use data in the paging (or swap) file that data has to be 'moved' to system memory and information in memory has to be moved to the paging file. This is called paging and the speed of the paging operation is limited by the speed of the hard drive. (laptops generally have slower hard drives)
The amount of paging is determined by the size of the system memory and the requirements of the programs that are running.
More memory can 'speed up' the computer because memory is much faster than a hard drive and with more data 'in use' there is less need for paging.