Save your money... rendering speed does not improve with more memory :( I have ran extensive tests on this and after 256 megs..no difference. The only thing that makes a difference is number crunching power.. or Floating Point Calculations. So far the best for this is the AMD Thunderbird, if you are an Intel fan sorry, this is nothing against them, but I have ran it on many machines with all kinds of memory and CPU's including a 1.1, 1.3, Thunderbird and P4's at basically the same speeds. So don't expect a big improvement if anything adding memory. Hope that helps save you a little ;)