I would recommend the following amounts of memory for your PC:-
Windows XP - 1Gb (1024Mb) minimum - 2Gb (2048Mb) optimum
(N.B. The maximum memory supported by Windows XP is 3Gb)
Windows Vista / 7 - 2Gb (2048mb) minimum - 3-4Gb (3072-4096Mb) optimum
(N.B. You need a 64-bit version of Windows Vista / 7 to fully utilize more than 3Gb) |