Originally Posted by pcmoddingmy
Yes, this was with the new retail mobo. Actually, almost all retail boards that I've seen have a lot of thermal paste on the NB. NB HS flatness could not be an issue.. looks flat to me.
To achieve load temps at 40C depends on room temp and case setup. Mine was 57C at 28C room temp, but this was with a 120mm fan blowing towards the mobo (from above the CPU socket). It only got over 80C when I had no fans whatsoever around the mobo. Note that the CPU was water cooled.
Gary, If the HS had poor contact with the NB, the HS wouldn't get that hot at all. In my experience, the HS got quite hot. This shows that there was "good" contact with the chipset. If it had poor contact, the HS wouldn't get warm at all. Anyways, swapping to HR-05 gave me 10C better in most cases but it did get around 70C when I turned off the case fan. This was mainly because the CPU was water cooled and the mobo had no airflow over it.
So, IMO the RD600 can get quite hot in a worst case scenario without no air flow over the mobo. Water cooled CPU must have better case cooling or a dedicated fan over the NB.