OK - I gave in and built my first C2D system yesterday - replacing an X2 4400+, SLI-DR rig.
I have DS3 (r3.3), E6300, Ninja B (120mm fan blowing to rear fan), 2 x 1GB Ballistix 6400, MSI 7900GTO, Antec P180 with the top and rear 120mm at low.
Played around a bit last night and left it running Orthos dual overnight at
420 x 7 at 1.375V, DDR 840 (4,4,4,12,2T) at 2.2V(+0.4).
No errors over 8 hours and TAT reports 63/65C. Now idling after half and hour and it is 51/52C.
I would like to go more but a bit concerned that I am not optimal with the cooling especially idle. I used my last blob of AS5 on the CPU so don't want to reseat it but maybe I need to? Thinking of playing with the fan speed settings on the case first - maybe needs an intake fan too? Any advice much appreciated.
I have DS3 (r3.3), E6300, Ninja B (120mm fan blowing to rear fan), 2 x 1GB Ballistix 6400, MSI 7900GTO, Antec P180 with the top and rear 120mm at low.
Played around a bit last night and left it running Orthos dual overnight at
420 x 7 at 1.375V, DDR 840 (4,4,4,12,2T) at 2.2V(+0.4).
No errors over 8 hours and TAT reports 63/65C. Now idling after half and hour and it is 51/52C.
I would like to go more but a bit concerned that I am not optimal with the cooling especially idle. I used my last blob of AS5 on the CPU so don't want to reseat it but maybe I need to? Thinking of playing with the fan speed settings on the case first - maybe needs an intake fan too? Any advice much appreciated.

TBH unless your IHS is very concave, it shouldn't matter if it's not totally flat. You can still get good temps with the right application of thermal paste.