According to Intel spec sheets:
To allow for the optimal operation of Intel processor based system the thermal solution should be design so that the temperatures remain within the minimum and maximum case temperature specifications (Tc). Intel defines the case temperature at the geometric top center of the processor I.H.S.
Removing the I.H.S will pretty much void all of Intel thermal spec’s as they are based on using the I.H.S. I don’t know but even I would hesitate on removing my I.H.S on my new CPU that I just spend $500 + just to say – look it’s more like a die sim now.
ftp://download.intel.com/design/Pent...s/29864310.pdf