Temperature difference between core 1 and Core0

Hi

good day

I have Intel CPU Core2Dou E6700 And I use the original Intel CPU Fan & heatsink

1: Why  difference Temperature between core 1 and Core0?

Please see Picture

: When the Full load CPU usage Temperate to High is 65~67 . Please see secondary Picture

2:  Is this normal temperature?

I'm worried. Please help me

Thank you And Best Regards