Hi. After cleaning the heat spreader and the contact area for the water cooling assembly, and reapplying the thermal paste, there was a bit of improvement on the heat issue, but not a great deal. Primes95 caused the temperature to hit 100C less frequently (after 5 minutes of testing), but as you know it should be nowhere near that. Its constant running temperature (with a browser and some other simple apps running) appears to be around 30C-36C. Any suggestions as to how to bring the heat down to something a little more sane during the testing?
Btw, I looked up this thing about the integrated heat spreader, and it appears to be the flat piece of metal that covers the top of the CPU.
Thanks for your help so far.