I just wanted to try and clear the air about this topic. There seems to have been a lot of confusion as to whether or not the 2009 NVIDIA white Macbook can accept DDR2 800Mhz RAM modules.
The answer is yes. I have installed 4GB of Patriot 800Mhz RAM with CAS timing of 5 and it works fine. Here are some screenshots -
http://farm4.static.flickr.com/3556/3385603872_19d7f60000_o.png
http://farm4.static.flickr.com/3605/3385603906_d763bd79e9.jpg
The answer is yes. I have installed 4GB of Patriot 800Mhz RAM with CAS timing of 5 and it works fine. Here are some screenshots -
http://farm4.static.flickr.com/3556/3385603872_19d7f60000_o.png
http://farm4.static.flickr.com/3605/3385603906_d763bd79e9.jpg