WPCREDIT & WPCRSET Users

[peteb]

Question,

When you use the bios setting for WPCR do you _hear_ the difference? When my cpu idles (every 4 hours or so in between seti WUs I hear the pitch difference in my cooling fan and assume the power loading on the PSU must have dropped?

Anyone hear similar?



-* This Space For Rent *-
email for application details

 

[patsvette]

i havent been able to find wpcrset whered you find it?

 

[peteb]

<A HREF="http://www.athlonoc.com/tweakvia1.htm" target="_new">http://www.athlonoc.com/tweakvia1.htm</A>

-* This Space For Rent *-
email for application details

 

[kanute]

I posted on this a while back. I'm assuming you're talking about the idle cpu fix. Whenever I use it, I notice that the fan pitch goes down when the cpu is idle and then when it is under load, it goes back up. It's quite odd. I know it can't be my power supply because I just bought a 431 watt enermax. Maybe it's normal?

 

[Guest]

Actually, I have that same power supply, and the fan pitch variations could be attributed to it. There is a temperature sensor in that beast that automatically varies the fan speeds. That feature is part of what makes an Enermax so quiet. At high load, your processor will consume more power, driving the temperature of your PSU up, triggering an increase in fan speed. At idle, the temperature controlling circuit drops the fans back down. Your motherboard may also do weird things to the cpu fan speed based on the temperature that it monitors whenever the idle bit is set. Of course, I could just be blowing tons of smoke, but this is the way I see things.


3C2X1(<b><i>Genius</i></b>).
Even though I'm a stranger, at least my average post is intelligent!

 

[peteb]

could be ps fan noise - i use the 450W Enermax too..

-* This Space For Rent *-
email for application details

 

[kanute]

I don't think it's the PS fan because I had the same issue with the 300 W PS I had before buying the Enermax. It's definately the CPU fan on mine because you can clearly hear the difference since it is one of those loud ass delta fans. The only thing I've been able to come up with is that maybe changing that 6B to EB also implements some sort of fan control as well, which speeds up the fan under load to keep temps lower? But that's pure speculation and I have no proof whatsoever of this, nor to I even know if it is feasible. Oh well, I'll just live with the pitch shifts for the idle temp drop. Idle at 38 now as opposed to 45... not bad

 

[peteb]

how would a motherboard registry setting affect a fan connected to a PSU? If it were off a motherboard header this may be ossible, but delta fans are usually connected to a 4 pin molex supply, not mobo. Mine certainly is.

-* This Space For Rent *-
email for application details

 

[kanute]

Well, I did a little expierimenting here, and found out why the fans are changing speed. When the CPU is idle, the voltages on the 12v and 5v lines are lower then when it is under load. On my machine, the 12v is at 12.2 when idle and 12.5 under load, and the 5 volt is at 5.1 idle and 5.25 or so under load. So, it would seem the increase in voltage translates into an increase in fan speed. Why the voltages are chaging is really beyond me. I have no idea how the motherboard registries could affect this, but they surely are because without the temp hack in place, the voltages remain steady in the higher load state. Maybe someone who knows a little more about motherboard registries can shed some light on this, as I have very little expierence in the area.

 

[peteb]

how about this?

The cpu draws a pretty high current at load - at low load - i.e. cpu halt or idle, the power output of the psu is lower.

Now maybe, at higher loads, the only way the psu can maintain the power output level is to actually raise the voltage a little, hence the fans spin faster? Just a theory.

-* This Space For Rent *-
email for application details<P ID="edit"><FONT SIZE=-1><EM>Edited by peteb on 05/23/01 11:00 PM.</EM></FONT></P>

 

[kanute]

Well, after some further testing, I'm not sure what to think. The voltages are definately changing under load, but it's not a steady thing. The increase varies in amount and sometimes it only affects the 12v reading while other times it affects all readings but 3.3v, including Vcore. It does seem odd to me that the PSU would have to up output when the CPU is under load, especially since I have a 431 watt power supply. But I have no other way to explain things at this point. Maybe someone else out there without an enermax power supply can tell us if they have the same side effect from the temp fix.