I'm interested in imac 21.5 inch with HD 4670. one thing i have to concern before purchasing is the fan speed of imac. if you have imac 21.5 with HD 4670 or 9400m and see this thread, please post your imac's fan speed and temperature on each state in the following format. full load or heavy load : * rpm, * Celsius, cpu xx% idle : xx rpm, xx Celsius hope you help me in deciding whether or not to buy it. i've searched forum for those thread and seen pretty a lot. but all of them mentioned about fan and temp under idle or said just good without accurate numerical value. I'm pretty sensitive to noise and temperature. that's why i posted this thread. thanks in advance.