Den inbyggda ska tydligen vara bättre.
http://www.hardocp.com/article.html?art=NTA5LDQ=
"In an expected victory, the Intel ICH5R based RAID0 16k block size array took the speed crown, beating out the 16k based Silicon Image RAID0 array by a whopping 7 MB/s in the average read score, and 40 MB/s in the RBS (Read Burst Speed)."