I don't think a MSI; ASUS cheap boards are really crap and the newest crap does not even have overclocking options. I am sitting on one of those crappy motherboards; the A8V-MX and even if I pushed it's HTT clock to 250MHz on an IDE HDD, my new SATA HD gets locked @ only 225 by the stupid controller :x .
How do you calc the natural speed for the AM2's? For C2D it is quad-pumped 1066, so 266 ext = DDR2-533. For AM2 I think they are 5x pumped so 1000MT is 200MHz external, therefore needing DDR2-400. So is the suggestion to go to DDR2-800 to obtain a 2:1 memory ratio?