Those temperatures are pretty decent for 4.5Ghz at 1.2v. And that's one of the reasons I won't use RealTemp along with the fact for some reason it doesn't like my ASRock motherboard.
I run my 2600k with Speedstep enabled with voltage offsets and run a max of 1.25v's at 4.4Ghz and don't break 63C under IntelBurnTest. The Ivy is going to run a little hotter either way; but those temps aren't bad man!
Still going strong after 11 hours
, looks pretty stable! Only problem now is that EIST and Turbo Boost are missing from the BIOS haha, and RealTemp keeps being an idiot and limiting my multiplier unless I un-check Disable Turbo Boost option lol.