So, i went out and bought 1g of kingston valueram ddr400 to go with my other 3. they are all the same. i booted up (seemed like the cpu was a bit slower), went into system properties to see if it has reconized the new RAm, and it hadn't. it still said 2.87 from be4. my motherboard allows a max. of 4g ram. so i tured it off and slid out he ram i just got(in slot 3) and booted up. this is the message i got. "Memory in cahnnel B. Maximum memory performance is achieved with equal amounts of memory installed in each cahnnel. maximum memory performance is achived with matched DIMMs. the installed amount of memory in channel A is not equal to the amount of memory size decrease." i pressed F4 to boot and everthing seems fine. What happened and what do i do? In the meantime im gonna return the Ram to see if thats the problem and hopefully by then someone has replied to me. THANKSSSS!!!