Actually I don't think you need the Thermalright 775 bolt-thru kit. We got very good performance with just the pins, but we installed them with the board out in the open. You're going to have to pull the motherboard out to do this anyway -- why not pull it out now (with the HS in place) and examine...

I purchased the D1264 for my new Q6600 build, and so far it's been ok. Installation was a nightmare, given that the pushpins required so much force to click into place, and when I pushed one corner in it would pop out when I went for the other corner. Needless to say the end result wasn't too great,...