tdbone1: Purpose? Probably to get temps and max overclock closer to that of SB, which were gimped by worse stock TIM between core & IHS. According to many that is more of a reason for worse temps/overclock (at least without throttling and with not extreme cooling solutions) then that of smaller core/more concentrated heat flow/more current leakage when overvolted & overclocked a lot. I'm guessing frustration comes mostly from high expectations from IB before it's launch. If it were at least as good of overclocker as SB without things like improving TIM, no one would bother. But with state of things being as is people wish to "fix" "intel wrong decisions" with this, relatively simple mod. As for warranty .. very few from overclockers do care .. and from what i've heard, few people online even sell pre-moded IB cpu-s with replaced TIM for some price premium