V3 with all morphs injected is about 118mb and pretty taxing on the system. I've never used more than 4 or 5 morphs at a time and V3 is quicker and easyer on my system than V2. Nice thing about V3 is you have the choice to inject just the morphs that you need. Depends on what I'm working on for a scene, 1 V3 in a scene with lots of morphs and I can't tell the difference from V2. 3 V3's in a scene with bunches of different morphs and it can really bog down the system, but I have never had it crash, just takes a long time updating movements, and rendering. Longest I ever waited was about 22mins for a scene to load, it was over 300mb though so there is that. V3 is really nice, pretty much only model I've been using lately just for the fact that V3 is so much more realistic than the older models, without all the fuss trying to fix older models to look real. I have a XP1700 with 768mb of ram and a 60gig HD. I do have to burn my scene files to CDs as working on multiple V3 projects takes up more and more space on the HD, but it's not that big a deal for me. hope that gives you some info.