266x? You must be joking. The Jackhammers only are 20 MB/s, and that assumes the machine can even handle that much data. Save your money and get a more reasonable card, something like an 80x. That's 12 MB/s there, still incredibly faster than the stock SCSI's 5 MB/s. But then again, if you're going to go to ridiculous extremes with a Jackhammer, SCSI-IDE adapter, and a CF card, I guess you might as well go with that.