Thanks Rudolf, I now use K8-temp and it seems to work. k8temp-pci-00c3 Adapter: PCI adapter CPU#0 Core1: +54?C CPU#0 Core2: +59?C I am using a sensors.conf of: chip "k8temp-*" label temp1 "CPU#0 Core1" label temp3 "CPU#0 Core2" label temp2 "CPU#1 Core1" label temp4 "CPU#1 Core2" Is this correct? I get no reading on temp2 or temp4, which is right as I only have one dual core Opteron in this two socket board. Thanks, Paul