<p>Okay so I’m not very knowledgeable about computers, but I just bought a Core Duo notebook. It came with both memory slots filled (512 in each), but I thought it would come with only 1 memory slot filled with 1gig, so I bought an extra gig. So I currently have 1gig installed in one slot and the 512 in the other. Now, I’ve heard that with a Core Duo processor it’s best to have the same ram speed/size/whatever in each slot for optimum performance, which means that me having 1gig in one slot and 512 in another is actually slower than having 512 in each. Is this true? If so i’ll have to pick up another 1gig stick of ram, but I don’t really want to if 1.5 is fine.</p>
<p>1.5 gigs are all right. I have the same setup with mine and it’s good. They just say that for the “best results.” I haven’t had any problems except for an unrelated speaker problem.</p>
<p>It will be slightly faster if the memory sticks are paired with the same size, but the difference is not something you will notice. You are better off with more memory than making sure that both sticks are the same.</p>
<p>However, some “integrated” graphics chips that share memory with the computer rather than having their own dedicated memory suffer somewhat from mismatched memory since they’re memory-bound anyway. That’s the only reason I can think of to pair RAM</p>
<p>Unless you see an obvious need to pair them up I would just leave it at 1.5GB and enjoy lots of ram.</p>
<p>If the speeds are different, your computer will use the slower one. Ie 133vs 100, it will use 100 regardless of the speed of the other RAM chips. However, I would take the 1.5gig unless the slower ram is CONSIDERABLY slowler, which I doubt. Good luck.</p>