I have the same issue with haswell under water. Even though the loop can dissipate the heat just fine, the die heats up because the IHS can't conduct the heat away fast enough. de-lid and your idle temps will go down 15-20C.
From: CJayC | Posted: 6/3/2003 GameFAQs isn't going to be merged in with GameSpot or any other site. We're not going to strip out the soul of the site.