Received my subzero4g (amd k7) yesterday and installed it today. I have an XP 2000+ ( palomino core). While the fan is not as quiet as i expected it is still quieter than my old fan. What concerns me are the temperatures. I am getting 48 deg C in silent mode during idle (according to Motherboard Monitor). In power mode I get about 43. However according to Motherboard Monitor the fan speed in both cases is about 4623 RPM. Shouldn't the fan speed be slower in silent mode? How can fan speed be the same in both modes?