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ICH5R with Integrated SATA and RAID 0
Intel is the world's first chipset maker to integrate Serial ATA (SATA) and RAID 0, 1 functions into the South Bridge. The latest ICH5R chipset now delivers 150MB/s fast data transfer (SATA) and striping performance to enhance computing efficiency.

http://www.asus.com/products/mb/sock...d/overview.htm