The first one for "CPU" is actually the socket temp. The second one, "Package" is the actual core temp.
Package temp shouldn't go above 65/socket temp over 75
Usually they are linked about 10c difference anyway's when at load, so if one gets too high, the other is right behind.
Your motherboard doesn't have the best VRM's or VRM cooling so that's going to affect the socket temp. To overclock higher, you'd want a better board and lots of cooling. To get to 4.6 on my 8320, I had to put a fan on the back on my motherboard to cool the socket to keep it, and the VRM's cooler and let me push more voltage in, otherwise it gets too hot.