in win2k, i can stay below 256meg usage with light gaming (ut, q3, ...) and basic usage (internet, word, ...). however, when i start getting down to the nitty gritty and i have acrobat5, photoshop6, 3dsmaxr3, dreamweaver4, and a handfull of windows and browsers open, i can easily be using over 400megs of ram (according to task manager). point being, it depends on what you do...i generally tell friends that 256 is the right amount for general purpose usage.