I aleready said it ,look closer in the first post I have a an ASUS P5N-D
So you did. My bad. If you're looking to get to 3.6, then any DDR2 800 ram will do. You have a multi of 9x. At 400FSB you will reach your 3.6 goal. If you're looking for high quality ram, go with http://www.newegg.com/Product/Product.aspx?Item=N82E16820144062
D9 chips. You can push it further than its rated 800. Most likely past 1000.