Default settings, linpack (via IBT) very high never goes over 49C on any core.
Some of the variation in time is due to it installing drivers on me while the tests were running, as well as my using of the PC for other things at the same time.
Based on the temperatures, this is how I am pretty sure the cores are numbered, but I could be wrong. 1 and 5 are the coolest temps with maximums 4-5C below the others. It could be the other way around and the memory interface is acting like a heat sink though.