I asked about this on the Daz loader thread and next realized that was not the best thread to ask this question. I figured a new thread in this forum might be best. I repair computers, however I am no programer nor engineer. The average member on this site seems more educated than myself. So I was hoping somebody here could help me understand why the sticks of ram that tested good on another computer and is the same type needed for this HP laptop is recognizing only 3 gigs out of 4 on this machine only. OS= Win 7 Ultimate 64 Bit. Like many others the first thing many think is I have Win 7 32bit, but that is not what is says when I right click on "my computer"- it says 64bit. Also I made sure the ram was seated correctly and the memory tested good for all 4 gigs in another system afterwards. It's got me baffled. Thanks.