PC Velocity heeft een kleine review in elkaar geknutseld waarin de performance van de Promise UltraATA/66 controller vergeleken wordt met die van de standaard BH6 onboard EIDE controller. De resultaten zijn opmerkelijk:
The Promise controller beat out the BH6 IDE controller by a large margin in only one test: AVS/Express. 3 other tests showed the BH6' IDE barely losing, while in every other test, the Promise controller produced scores that were significantly lower, some nearing 50% worse, than those of the motherboard's controller. CPU usage was also higher with the Promise controller, which leads me to ask why one would possibly want to pay for a controller like this right now for this kind of hard drive. These results may have turned out differently with a 7200 RPM drive, but with this make of drive and this controller, I saw almost no reason to recommend the Promise controller over the BH6' own IDE controller. Many consumers may wind up buying these 5400 RPM drives that supposedly offer Ultra ATA/66 compliance as well as a Promise controller, and may be in for a very big surprise in performance when they set it up.