I just bought an emachines T3642 just so I could try out Vista for the first time and see if I like it (the T3642 is on sale at Office Depot for $250, after $100 rebate. Hope that goes thru. The T3642 has an Athlon 64, socket AM2 single core (not dual) 4000+. Anyway, first thing I got it out of the box and popped open the side to get a look at the motherboard. According to the label on the motherboard it's a Foxconn MCP61SM2A-RS2H. So I went to the Foxconn website to see what I could do with this thing in terms of another CPU and memory. Well, the Foxconn specs for the MCP61SM2A-RS2H motherboard list it as having 4 DIMM slots and capable of holding 4 gb max ram at 800 mhz. This motherboard has only two ram slots. Also, the MCP61SM2A-RS2H motherboard does not have NVIDEA graphics, shich this one does. It really does, first thing on the computer from me after AVG was Everest home 2.2, CPUID and GPU-Z. There are four motherboards listed on the Foxconn site that have NVIDEA graphis, and of those only one has only two DIMM slots. All the motherboards say they can handle X64 CPUs and all list a max ram of 8 gb. What I want to know is, did emachines get a special board version of the Foxconn MCP61SM2A-RS2H with only two ram slots or is it the other board and the sticker on this one is not correct. Since this is a single core processor and the fastest single core that will fit in an AM2 socket, there would be no point in replacing the CPU if the memory is only going to run on a single channel. Is this right? How do I tell if the board will sue the memory correctly if I get a dual core CPU. Also, need to know whether to go with 2gb (1gb X 2 sticks) ram or 4 gb (2 sticks X 2 gb). Help Help to all of you that know more than I! Oh, yes, and I am aware of the power supply debate in regards to the e-machines. This is not my only computer (there are 5 right here where I am sitting) but if I like vista (at first glance it bugs me being so used to XP Pro and I hate the idea that the license is tied to the motherboard) so I can play with the emachines box.