I'm running an ASUS p4b533-E that has onboard RAID 0/RAID 1 support. The chipset is a Promise PDC20276. For years I had used a Promise 100 card as an IDE controller and not for any RAID configurations ...
well, it's all academic now anyway. one of my ibm 60gxp looks like it's finally proved itself to be inarguable AFU, so i don't have two of them (the other one has been running happily on a ECS board ...