MaximumPC just had an article about this, they baselined Win98 and W2K and came up with best/best as being, Win98 128/192 and W2K 256/256, the actual performce per MB RAM started to flatline beyond those numbers. So for instance you would see an increase in speed up to 192 in Win98, then it would barely improve performance if at all and basically w/W2K it increased very slowly beyond 256MB but it did increase, just not enough to justify the cost of adding lots of memory for an avg. power user.
SHUX