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How do I set my CPU fan speed to be controlled automatically

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Hi I have an Intel Core 2 Duo E6700 (with a 4-pin connector) with the stock HSF, and an Asus P5B Deluxe motherboard (with a 4-pin CPU_FAN socket). I am trying to get my CPU fan speed to be regulated properly.

Is the stock fan supposed to automatically speed up and slow down depending on CPU temp/load? If I leave Asus Q-Fan off, the fan stays at 2000rpm (is this the maximum speed of a stock Intel fan?) and never changes speed, regardless of load on the CPU. With Asus Q-Fan ON, the fan speed stays at around 700rpm and never changes - this also causes the motherboard to give me a "CPU fan error" every time my PC starts, and obviously the CPU temp is a bit high. There is no option in the BIOS for a "CPU target temperature" so I can't get the fan to spin any faster with Q-Fan.
What is the normal way to regulate CPU fan speed?
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I personaly like speed fan (many people don't) and yes its freeware, however it only works with about 2/3 of all computers.
You can set the desired fan speed and the temp. at which it should speed up .etc A big downside is that it uses about as much RAM as a regular medium-small program. A way to control fan speed without using ANY RAM is this http://cgi.ebay.com/...1QQcmdZViewItem
and here's the search if you'd like a less expensive one. . .
(sorry but I am an eBay type of person!!!)
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