There is another thread running on memory usage and "Lite"ness. In there there is a good description of memory and how your PC uses it. Now...many RAM "Boosting" applications will "free-up" memory that is not in use but requested by applications. Doesn't seem like a bad idea until applications like LiteStep use that memory often and have to reallocate or deal with what it has "slowing" things down. Best bet...let your PC manage your memory for a bit and see how out of hand it gets.