華碩系的話有官方認證通過的記憶體:
P4P800 / P4P800 Deluxe:
http://www.asus.com/products/mb/soc..._DDR400_QVL.pdf

P4P800 SE:
http://www.asus.com/products/mb/soc..._DDR400_QVL.pdf

P4P800-E Deluxe:
http://www.asus.com/products/mb/soc..._DDR400_QVL.pdf

P4P800-X:
http://www.asus.com/products/mb/soc...0-X_DDR_QVL.pdf

P5P800:
http://www.asus.com/products/mb/qvl/P5P800_DDR_QVL.pdf

如果有需要就參考看看吧