IBT stress test is very stressful indeed but it does not take ages to run.
http://downloads.guru3d.com/IntelBurnTest-v2.3-download-2047.htmlMake sure that you do not have anything running in the background & have a fire extinguisher handy

Use maximum or high settings levels for memory 15 or 20 runs.
Typically on my setup it peaks about 10c higher than Orthos but i run Orthos for 8 hours minimum on
after it has passed IBT.
I also run a combination of other stress tests for GPU & also some games.
To monitor temps i use Core temp(
http://www.alcpu.com/CoreTemp/) &
i use CPU-Z for other information( v core etc) (
http://www.cpuid.com/softwares/cpu-z.html).
Note that the VID shown in Core temp is not V core.