I read on a page (the link i posted earlier) that some RAID-controllers (especially built-in ones) eats up the PCI bandwith and therefore can cause sound-recording to make pops and cracks witch must have been the problem in my case since disabling it solved the problem. Can?t remember if the same thing goes for SATA. As for speed; i havent noticed any speed-decrease after going back to ATA133. Actually my computer start up quicker now since the RAID-controller isn?t using time to search for disks on the RAID anymore
