I've had enough bizarre system crashes in my day to know when I have bad RAM. But I've never seen a stick die completely and the system keep functioning. That appears to be my situation right now. I have 1 gig (two 512 sticks) installed but system properties only shows 512 total system memory. I guess what I'm wondering is if I should just order more ram or do I need to thoroughly examine my system and see if there might be a problem with the ram slot or maybe the whole motherboard. I keep delaying my plan to build a new system but if this is more than just a bad stick I'm going to have to get on it. **EDIT** Opened the case and checked for loose connections. Everything seemed fine, rebooted and it's showing a full gig again. I have no idea what (if anything) that means.