Hi (I just try to make a new tread) 3 weeks ago I bought my first white macbook. (so I'm a nobe) And now I just installed my 2x2Gb KVR667D2S5/2G kingston ram. Everything works perfect and the machine works very fast, but when I go to about my computer it tells me that my computer have 4 GB 800 mhz ram. I'm concerned, because I was told that the my macbook only takes 667 mhz and if you put 800 mhz ram into it, the macbook will automatically change it to 667 mhz. So what shall I do: Will the ram get to much power, should I go chance it in some menu, or is it OK that it shows more than the ram is, cause the macbook did it, it self? I really don't want my macbook to crash. Hope for some help.