Title says it all. I'm running windows 7 64 bit. I have 4 slots all filled with 1gb ddr2 5300 RAM. I play games. I have a radeon 5770 gcard. If you need more info just ask .
More aboutreduce usage
I'm not seeing a problem with your set up, Why would you want to reduce ram usage? if its like the system is using 80% of the memory available, you could either use a flashdrive for readyboost or just buy more Ram Moto