Temperature Issues

I am getting a warning from my CPU monitor that the MB temperature is too high. The graphics card is also very high.

CPU: E8400
MB: ASUS P5Q PRO
Graphics: GeForce 9800 GTX+

CPU: 44 C
MB: 47 C
GPU: 65 C !

I've tried lowering the clock setting below default and speeding up fans. Sometimes it works, but today the temperatures are just crazy.

What should those be? I do not know what the target temperatures are, just that it's sending a warning and that GPU temp sounds ridiculous.

GPU's are safe up to temperatures around 100C, 65C is well within the safe margin.

Is it a really hot day where you are because cooling is greatly affected by ambient temperature.

It fluctuates a lot with ambient temperature, yes. Thanks for telling me the target temperatures for GPUs. What should the CPU and MB be?

The case door is open because I have not finished putting everything together. Does that improve cooling or make it less effective? Is underclocking a good or bad idea?