Quote Originally Posted by jonny_ftm View Post
3-6°C between core is the most frequent. I had two Q6600. The first, was about 2°C difference only, the second, is about 5°C on load. I tried reseating many times, and also rotating my Apogee GT waterblock. In fact, as well described, I noted a trend change on the temperature difference when rotating the waterblock. It depends on the water flow through the cores, and probably on the flatness of surfaces.

This was largely debated in late 2006/early 2007 when quad cores arrived. Lapping the IHS of CPU helped most people at limiting the difference in temperature. Also, using some blocks like the Fuzion or the GTX is known to help

At 10°C difference on load, I'll definetely lap my CPU if temperature is limiting the OC
Temp is def my limiting factor. Jan is when I will take apart my WC loop and then I plan to use a custom backing plate and use a fuzion nozzle setup for the cpu. Lapping a cpu, right now for me, is like the black arts. Not sure what's involved or what tools to use to go about it. I am very pleased with my speed and dont think even with all the addons ill make it stable over 4GHz, but it's worth a try, if not just once.