iXBT Labs heeft een vergelijking gemaakt van bijna alle populaire ATA66/100 controllers. Op de testbank werden de CMD648, HPT366, HPT370, Promise Ultra66, Promise Ultra100, Promise Fasttrack66, Promise Fasttrack100, Intel 820(ICH1), Intel 815(ICH1), Intel 815(ICH2) en VIA Apollo Pro133A op de proef gesteld. Deze controllers werden allemaal aan een uitgebreide suite van benchmarks blootgesteld en dat bracht de reviewer tot conclusie dat de Promise Ultra100 en de CMD648 de beste ATA controllers van dit moment zijn. De veelgebruikte HighPoint HPT370 kwam als slechste uit de bus:
And finally, the most unlucky buddy of our roundup: HPT370 in ABIT HotRod100 Pro. At first we had stability problems with IBM DTLA HDD. The controller didn't recognize the harddisk correctly and tried to assign it UDMA2 mode. Having reflashed the new BIOS (version 6.22) we managed to eliminate this problem. In fact, we have to admit that the driver of this controller is best of all optimized for work with file system. And our tests proved this point: the controller took the lead in all file benchmarks. However, the synthetic benchmarks appeared a stumbling stone for HPT370 and it dropped down to the last position there.
All in all, we have to say that the performance difference between ATA/66 and ATA/100 controllers isn't great at all. If you are a happy owner of an ATA/66 controller, replacing it with an ATA/100 one doesn't make any significant difference. We would recommend deciding on Promise Ultra100 or CMD648 (ASUS PCI-66C, for instance). And those of you who are planning to get a new low-cost system, i815E or the good old buddy i440BX will be a nice solution.