I'm building a new PC, and I plan to use 64-bit Windows 7, so I can utilize more than 3GB of RAM. Looking at people's recommendations, I can see the favored amount is 6GB of RAM. I wanted to future-proof my RAM needs however, so I was looking at getting 8GB of RAM. Then I found out that DDR3's performance advantage over DDR2, only happens when you have RAM installed, in multiples of 3. So to get more than 6, and get the benefits of DDR3, I would need 12GB of RAM. Is this too much? Is there any advantage to 12GB? Would this be a disadvantage, somehow? Thanks for any info