I5 6600k overheating with stress test

[Telamenais]

Hello I recently decided to overclock my i5. I got it right up to 4.6 and decided that it was enough. I have a corsair h100i v2 so I should have adequate cooling. When I went to do a stress test (Intel burn out) it pretty much shot up to almost 85c in about 10 seconds. However in normal use it never gets above 45c even in most games. Obviously for this sized cooler somthing is wrong with it and im not sure if the pump is dead. My case is small and I don't have the right header for the corsair link on my mobo. Also I could only fit one fan on it even though it can fit 2 however than hasn't really mattered in the past. So any ideas about what's going on? Will I need a new cooler or am I over looking somthing. Thanks

 

[tanckattb]

What voltage are you running at to run your CPU? Also it is a stress test so temps would be hotter than normal, but not 40 degrees celsius above gaming temps