Yes, 25 mods (albeit more now and still stable). That's the point actually, I like to chose the mods to install so the game don't lose the character and becomes a confuse mess. Hardly I ran two overhauls at same time for that would probably kill the experience each one brings. The mention of my rig was to say it is far from so good as yours and I get no crashes in Skyrim for long time now. What was meant was overloading the system is not the best way to get it stable. Edit - the amount of memory is related to the number of threads the game can deal at same time, before the patch to 64 bits lack of memory management capacity could be the cause of crashes but telling the game is crashing for not "having" more memory is a long shot for it's not it is trying to get more and don't having, actually it can't even fill the max as yourself noticed, what is causing crash in your setup is something else, those much mods almost certainly is causing some kind of problem. Remember that having many mods don't imply they are all active at same time, then is not only the quantity but how they behave together. More mods, greater the chances for conflicts.