Slow CPU?

I have a strange problem with a dual Opteron server in that one of the CPUs seems to run at 1/10:th of the speed of the other CPU. Very annoying. Has anyone else seen anything like it? Configuration: Tyan Thunder K8S motherboard Dual Opteron 244 (1.8GHz) 4GB RAM SuSE Linux 9.0 for AMD64 I previously thought that it had something to do with the beta of SuSE 8.2 I used to run, but since the problems still is there now when I've installed SuSE 9.0 it must be due to something else... - Peter