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-   -   Beware of Asus mobo's with EPU do not buy (http://www.linuxquestions.org/questions/showthread.php?t=4175436119)

mrapathy 11-07-2012 12:49 PM

Beware of Asus mobo's with EPU do not buy
 
if your planning to build a AMD system avoid Asus motherboards with EPU which last I looked AM3,AM3+,FM1,FM2 all have EPU which is Energy Processing Unit it controls cpu core voltage and fan speeds which cpufrequtils cannot access

epu so far only has windows drivers and control app.

when booting into bios or linux the system will runaway with cpu and motherboard heat hitting 40c for motherboard and 40+c for cpu. little worrysome for motherboard but not bad for cpu but in windows the motherboard and cpu will run 30-33c at rest and can be tweaked via epu to run lower or if one wants higher but cpu fan will go to high rpm and get noisy.

TobiSGD 11-07-2012 02:08 PM

Running Slackware 14 on an ASUS M5A99X EVO with a Phenom II X6 1055T (125W TDP), no problems at all. System operates in the same temperature range as on my Vista installation on the same machine.

mrapathy 11-07-2012 02:37 PM

I am using a Asus M4A88TD-V EVO/USB with Phenom II X4 955

I have tried previous version of slackware to 14,debian 6,6.0.4,6.0.5 all 64bit
all gave me same results as booting to bios or non windows environment
mobo and cpu 40c+ temperature.
using windows 7 64bit sp1 with no probs but I am sick of windows.

like encrypted hd and debian install sets that up nicely compared to slackware.

will give slackware 14 64bit a try though have a feeling it will be the same.

did you use the previous slackware version with any heat issues?

TobiSGD 11-07-2012 04:01 PM

No, but I have a guess what is going on here. In the BIOS no power-management, like CPU frequency scaling, sleep modes, etc, are active. May it be that for some reason the power-management on your installs wasn't working correctly, for example frequency scaling set to userspace or performance governor?

mrapathy 11-07-2012 04:30 PM

power management on my installs was working
not sure what you mean about BIOS no power-management

had cpufrequtil set to ondemand and my 4 cores were running lowest speed they could but system heat was still high


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