Hard disk connected in RAID level 5 allow to combine three hard disks, and the overall accessible volume will be limited to only one of three disks. If one disks fail , data remain in other. In a certain degree RAID 5 is competitor to RAID 1, witch in made by two disks only . RAID 5 in its most primitive version does not require such resources as more reliable disk raid configuration; therefore its support was already injected in chipsets from intel and Nvidia company.
It was originally assumed that the south bridge SB700 will bring RAID 5 support , witch will come with the prepared for announcement in this autumn chipset RD790. It was more lately explained that SB700 will be limited to the support of regimes RAID 0, 1 and 10.
But if the presence of RAID 5 support using the south bridge is critical for you , then in this case with the corresponding function in AMD chipset will appear only with the release of south bridge SB750. Specifically, RAID 5 support will become the main difference between SB750 and SB700. Both south bridges support 12 ports USB 2.0 and 2 ports USB 1.1, six ports SATA-300 eSATA port , sound class HD audio, and also up to 2Gb flash- memory, which works with technologies ready-Boost and Super-Fetch.
The precise appearance periods of the south bridge SB750 are defined , but this will happen for sure in 2008. To the end of 2008 will appear the chipset AMD RD890, which already use the south bridge SB800.