Am using GIGABYTE GA-Z68X-UD3H-B3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard with an i7 2600k oc to 4.4

In cpuid monitor it shows tmpin0, tmpin1, and tmpin2, with the temps reported as (value/min/max) tmpin0= 33, 30, 33 tmpin1=25, 25, 25 tmpin2=29, 26, 38.

Anyone know what those terms monitor? i would assume nb/ sb and maybe mb? but dont know which is which

And is it normal for one core of the processor to be 10d C (consistantly) lower then the other cores? whats a good idle temp for the i7? im ranging from a low of 20 to 35 (on idle) for the various cores. Under full load gets as high as 60d C

Thanks in advance/

San