well the TIM still cant be that great. Last year ocuk sold clocked bundles with delidded 4770k's were the paste was replaced with coollabs lp. Which will be a thinner layer than stock. Theese chips had the ihs stuck back on with the factory sealant/adhesive so the gap was still there, (and probably bigger due to a thinner layer of TIM). Yet these chips still ran 15-20c lower than stock ihs versions.
yeah my mate has one at 4.8 and its very cool low 50c when maxxed.