So, lately I have noticed that my memroy has droped from the 1gig I had to 512 Mb. It still shows up as a gig in cpu-z, but only as 512 in the task manager. I replaced my slowest stick of memory (pc2100) with a pc2700 my dad had lying around in his office. But it still shows up as 512 in task manager. Usually, I can take the memory out and put it back in to get it to show up as 1 gig, but that is starting to get a little annoying. So, my queastion is, is one of my memory slots going bad, and why does it show up in cpu-z but not the task manager. And why does it seem to work after I take it out and put it back in.