So i have 2 x 2GB 800Mhz DDR2 sticks and 2 x 1GB 400Mhz DDR2 sticks. If I use the 1Gb 400Mhz sticks with those 2G 800Mhz sticks, it would perform in 400Mhz and i would have 6Gbs of RAM and if I would only use the 2GB sticks it would perform in 800Mhz and I would have 4Gbs of RAM and i was wondering which setup would help my computer to perform better in daily use like gaming Sims 3, Dirt 2 etc. and surfing the internet? More RAM or better Mhz?