I'm running an AMD Sempron 3400+ Manila core 1.8 Ghz on a Biostar MCP6P M2+ mainboard. I currently have 2 GB DDR2 RAM. Would adding another 2 GB (allowing it to run 4 GB in dual channel) give a noticeable performance increase or would the Sempron 3400+ 1.8 GHz limit any gain in performance? Thanks a million for any help. I just don't want to spend money on the extra RAM and end up realizing that I don't see much of a difference.