seems fine
I'm running an intel D950 on a GA965p-DS4
before overclocking it my idle temps with stock cooler were 39deg, My Zalman cnps9500 brought them down to around 34/35 deg.
Overclocked the son of gun now to 4ghz with a slight increase in voltage and my temps (with Zalman cooler) idle are around 44 deg.
It will depend on your chip as much as your motherboard and cooler, running a conroe I would expect lower temps, have you tried any other cooling solutions?
A friend of mine bought the same chip as myself and his idle temps with no OC are 50deg. Luck of the draw sometimes.