How to test IDE controller transfer rate

Without any error messages my daughters PC started running real slow. I ran “performance test” and noted real low data rates from HDD. Changed drive with another HDD, newly formatted, fresh copy of XP, different IDE cables and ran test again. HDD still has low data rate. I suspect the controller might have a problem (onboard IDE controller on Soyo MB). Is there any test that can be done to verify or am I looking at a new mother board?