<string>CPU A core from PCECI</string>
<string>CPU B core from PCECI</string>
Running on a 2010 Mac Pro, you show CPU A core from PCECI as 68-70°C at idle. When at 100% CPU load, it shows 38-43°C. What you're reading is the delta-T reported by the DTS from #PROTCHOT activating; that is degrees below thermal throttling threshold. On most of these CPU's, it's 100°C.
At idle then, my CPU is 70°C from Tj. Max of 100°C, so it's 30°C. Under load, it's 40°C from Tj. Max of 100°C, so it's 60°C.
You currently have it inverted, so if you've got fan speeds linked to CPU core temp, the fans will in fact slow down as temps go up.