Does it make much difference having the PC2100 stick in a different DIMM slot?
Hmm...couldn't tell ya the answer to that. If it's a bad memory stick it'll halt up your entire system, it won't load up your OS and then when you go to need more memory it THEN access's it and crashes ya see? So basically it's like, either it works or it doesn't, no real inbetween. Pretty sure it uses all of them at once, only reason I say this, is because it has to be accessed simply to tell you that you have 768 when you go to PROPERTIES on 'My Computer' ya know? There's a program like TweakUI that lets you free up memory, but that's not the same as allocating it to certain programs or anything like that.