Core temp, cpu temp, and general OC

Okay, I have a few questions regarding temperatures and overclocking. I have a amdx4 960T. My core temps never went above 35C on a full prime95 load on 3.75Mhz. The "cpu" temp on the monitoring programs was at about 49C. Which one am I watching for while OCing. Because I have quite a bit of leeway if it is the core temp but if it is the cpu temp then I will end up frying my card very shortly. Here is an image of all 4 program temps I got.



Now also, The wattage readout on one of the programs showed at full load it was using 118 watts and ~150 with gpu going full blast(6770). Does this seem right to you? I figured atleast 350w. anyway as far as overclocking what is 1. the max temp( i thought 62 but i want to stay in the 50s) 2. max voltage for the card 3. most stable OC you have heard of on this card on air cooling granted I have one beast of an air cooling system(10 fans and i set up to 100% when benchmark and heavy gaming) I idle at about 15C. 4. What temp do I look on while OCing. 5. Would I actually be better off unlocking the 6 cores on it( i have done this twice but the temperatures dont get measured so I dont feel comfortable not knowing it could be burning.

Thanks for reading my novel and answer only in essay form. you have 60 minutes from now.....Start.