Hey guys, this is my first post here! I have a quick question. I currently have a Macbook 2,1 and it only has DDR2 2gb 667mhz of RAM. I am planning on putting 2x2gb RAM in it to get it up to 3.3GB of RAM. My question is would I have to be limited to only using 667mhz of RAM in my Macbook? A friend of mine has DDR2 2x2gb 1066mhz he's willing to let me use. Would it be safe for me to use that memory? Would the memory be compatible with my Macbook? Any info would be great! Thanks.