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weird problem
I've got a very weird problem... well it's not that much of a problem really, but I really don't understand what's going on:
I recently bought a new PSU, i.e. an Aopen 250 Watt ATX one, and got rid of my old 230 Watt ATX PSU, which had a dirty fan which was a bit noisy.. and because of some deal I could get the brand new AOpen PSU for the same momey that it would cost me to switch the fan in my old PSU.
The AOpen PSU has something called 'noise killer', which I assume is a temperature feedback system that will let the fan in the PSU run faster when temperature is rising past a certain trigger temperature, etc.
The weird part is that I can hear my PSU's fan speed up when I use 100% CPU Time, like when scrolling a webpage with pictures in IE5, etc.
It will speed up _instantly_ when the CPU is at 100%.. no delay or anything at all... and as soon as the cpu time drops to sub 50 percent the fan immediately spins to a lower speed.... HOW ON EARTH CAN THIS HAPPEN!??!?!? (btw. I don't have a temp sensor in my case that senses my CPU's temp... just one for case temp and one for the BX northbridge temp).
I didn't know that the mainboard could provide feedback information to the PSU about CPU usage or anything at all untill now.. (at least that's all I can think of that is causing the PSU to change fan speed immediately according to CPU usage)..... does anyone have even the slightest clue what is going on???????
I recently bought a new PSU, i.e. an Aopen 250 Watt ATX one, and got rid of my old 230 Watt ATX PSU, which had a dirty fan which was a bit noisy.. and because of some deal I could get the brand new AOpen PSU for the same momey that it would cost me to switch the fan in my old PSU.
The AOpen PSU has something called 'noise killer', which I assume is a temperature feedback system that will let the fan in the PSU run faster when temperature is rising past a certain trigger temperature, etc.
The weird part is that I can hear my PSU's fan speed up when I use 100% CPU Time, like when scrolling a webpage with pictures in IE5, etc.
It will speed up _instantly_ when the CPU is at 100%.. no delay or anything at all... and as soon as the cpu time drops to sub 50 percent the fan immediately spins to a lower speed.... HOW ON EARTH CAN THIS HAPPEN!??!?!? (btw. I don't have a temp sensor in my case that senses my CPU's temp... just one for case temp and one for the BX northbridge temp).
I didn't know that the mainboard could provide feedback information to the PSU about CPU usage or anything at all untill now.. (at least that's all I can think of that is causing the PSU to change fan speed immediately according to CPU usage)..... does anyone have even the slightest clue what is going on???????
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