I have a Dell Inspirion 2650 laptop, older model, I know. Okay, I read in the manual that this machine can hold 512 mb of RAM. Right now there are two slots in the machine. One stick is 256 mb of RAM and the other one is 64mb. Now, this unit has had one update to one stick to the 256 and I went to Best Buy today and had the Geek Squad look at how to replace the other smaller stick of RAM. She looked with us right there and she said the smaller stick of Ram is integrated into the motherboard and I would have to replace the motherboard to upgrade that ram and she said a new pc would be probably cheaper. She also told us we could not upgrade the 256 to 512, cause then the machine wouldn't read it cause of the other "integrated stick of Ram." But why does the documentation tell me that this machine holds 512 mb of ram? My question is this? How do I upgrade the system ram to 512? Ever heard of integrated ram?