I have an Athlon64 3200+ running on a K8V deluxe
. I've had my share of troubles with the system but I picked it because the board is passively cooled. Anyway, I've been lurking here for quite some time and wanted to share some of my experience. Thanks for all the wonderful posts and reviews on this site. I'm hooked on silencing now!
My CPU was purchased in February so it defaults to the older version of Cool n Quiet (800Mhz low power state at higher voltage). I am running Windows Server 2003 and the CnQ driver doesn't seem to work properly. My cooler is a Swiftech MCX6400V
. I was running a Silenx thermistor fan and am now trying it with a Panaflo L1A (PWM controlled).
The cooler is quiet and the CPU usually stays between 55-60C when Folding @ default voltage + silenx. I tried to undervolt and was able to reduce Vcore to 1.4 volts reliably. This roughly 10% decrease dropped temps by ~4C. I couldn't go any lower without getting Machine Check Error warnings.
I noticed ClockGen
and decided custom underclock my box.
After re-enabling CnQ in the Bios, I was able to get as low as 1.075 Volts @ 200x 7 (1.4 ghz).
At this setting the CPU stays within 2 - 4C of "mobo temp" if the panaflo is @ 12V. The difference is much higher @ 7V--more like 10C. This isn't all too impressive except that the case temps have dropped too so the system is much cooler overall. I suppose the swiftech isn't exactly the best ultra-low airflow cooler. Maybe next time I'll try an exhaust-ducted Alpha. Of course, my next mission is to reduce HD noise! My 15k3 scsi drive might force me to apply some form of accoustic damping to my 3700BQE.
Anyway, I just wanted to say that you are not limited by the default CnQ settings when undervolting your A64. The advantage of this method is you get to choose exactly when (and by how much) your box speeds up. My box was stable and quiet before, but the temps made me a little uneasy. Now my temperatures are awesome.
*Note: The temps are here just to give a general idea of the reduction that is possible. There are no hard temperature comparisons because my system is always in state of change and the only tool I have for temp monitoring is Asus Probe software. I swapped between Silenx and Panaflo fans and also reapplied AS5 last night.