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It is true that there's a lot of confusion regarding this board/cpu and the right BIOS version.do note that the 2.x bioses are often not the right ones to go with, onless you have a newer cpu (not Sempron).What cpu is installed? (Clawhammer, Newcastle)?
Run CPU-Z and look there ==> http://www.cpuid.com/cpuz.php
Fall back to 1.9 bios. I think you'll be fine then.
a quick search found this in linux sofpedia http://linux.softpedia.com/get/System/Hardware/cpuinfo-29126.shtml by clicking on the utilities header then searching on CPU several possibilities popped up- which will fit the bill is up to you- I am opposite youI don;t run Linux so i don't know which would work best with Debian.barring that you would need to pull the heat sink wipe the goop and write down the numbers of the processer -then search the net for the numbers= usually a quick search will find you a link to the crossover table giving you model number etc.
What fans do you have? Cool'nQuiet is mostly aimed at controlling the processor performance. (Semprons and performance in the same sentence...)
Sensors have been activated? No Zalman Fan-mate affecting things?But like I said, the Cooln'quiet is mostly for the processor, and when the processor gets cooler fans slow down as a secondary effect.
Neither does BIOS, (but fairly close). The fan control resides in BIOS. I'm not perfectly sure it is SmartFan, but something like that.
You can test it yourself, I believe, even if Linuxian: In BIOS load SmartFan or similar and lower the processor speed. Fans should/will spin down as a result of lower temp. Notice in the link that fan control isn't explicitely(?) mentioned. ...Neither is Sempron, if I remember correctly.
Sempron is not among the processors supporting Coolnquiet. See my previous link and your manual p1-6.Coolnquiet is in BIOS, p3-24 in your manual. It could well be through the SMBus thing values are monitored. Maybe by the way of CoreCell chip to get deeper control and a Windows screen on things.