Hehe, borked indeed. No file system, all Windows and RAID options at default, i.e. Windows write cache on, RAID cache on, NCQ on, 64K. The pics are HD Tach 8mb, 32mb, then variable, then HD Tune.
Results from the ICH7R RAID 0 with two drives and 128K stripe are somewhat intriguing themselves, though not nearly as weird as with the 3ware. Here's a set of results from HD Tach, 8mb, 32mb settings. I have a variable run going right now and can post that when it's done.
Oh and FYI, getting back to the 3ware, I did try the card both in the PCIe-X4 and -X8/16 slot and there was no difference.