I was just wondering if controllers are worth it anymore. I saw one that had a 512mb cache. You can hook up the 15k hard disks to them. Do these controllers really take a huge load off the cpu? Or is the ICH9R Southbridge just as effective. How much cpu usage does the ICH9R really take? Would I see a noticeable difference with a controller. What about a controller that handles most of all the Southbridge functions, dvd, usb, hard disks, plus all the cache, do these controllers exists? If they do, are they worth it in terms of letting the cpu breath better?