How to underclock the AMD X2 3800+ processor ?

Ok,

I tried the following settings:

1. Cool N Quiet Disabled, CPU at 1.1 volts.

This is very dangerous and can cause system instability !

The CPU was running at 1.1 volts but it appeared the cpu multiplier was
still at 200.

(Or maybe it wasn't updated fast enough, but I don't think so)

The cpu was at 1.1 volts and still simply running at 2000 mhz per core, so
that's dangerous ?!

2. Cool N Quiet Enabled, CPU at 1.1 volts.

I checked with AMD Power Monitor...

The processor simple goes to 2 GHZ per core when it needs to process.

So end result is:

1. CPU multiplier is locked.

2. Impossible to underclock the CPU ?!?

Bye,
Skybuck.

I tried setting the cpu voltage at 1.1 volts.

It looked like it didn't matter the cpu was still running at 2.0 ghz per
core.

It's actually dangerous, the system became unstable during boot.

Weird though...

How does AMD Power Monitor do it ?

It probably also reduces the voltages... but how come it's running then at
1.0 ghz per core ?

Maybe it's because of cool n quiet... some build in technology into the chip
itself.

Maybe the processor is regulating itself and "ramping up" when necesarry.

The question is can the cpu be prevented from "ramping/speeding up".

Probably not ?

It seems completely automated ?

Bye,
Skybuck.

Also what do these settings do and mean ?

K8 to NB Frequency: 1x - 8x, Auto
K8 to NB LinkWidth: 8/8, 16/16, Auto
SB to NB Frequency: 1x - 8x, Auto
SB to NB LinkWidth: 4/4, 8/8, 16/16, Auto

NB =north bridge.
SB = south bridge.

K8 is probably the processor ?

These settings seem memory and/or bus related ?

Also now that I am discussing bios options...

What is interrupt 19 capture ?

Also what is cache scrub ?

Bye,
Skybuck.

"Skybuck Flying" wrote in message
...
Also what do these settings do and mean ?

K8 to NB Frequency: 1x - 8x, Auto
K8 to NB LinkWidth: 8/8, 16/16, Auto
SB to NB Frequency: 1x - 8x, Auto
SB to NB LinkWidth: 4/4, 8/8, 16/16, Auto

NB =north bridge.
SB = south bridge.

K8 is probably the processor ?

These settings seem memory and/or bus related ?

Also now that I am discussing bios options...

What is interrupt 19 capture ?

Ok to answer my own question.

Int 19 seems to be boot related.

When enable.. the system could use some other boot rom on some device or
something

http://www.techarp.com/showFreeBOG.a...ng=0&bogno=290

Maybe to test motherboards or so with some external equipment

Bye,
Skybuck =D

On 15 Jun, 18:19, "Skybuck Flying" wrote:
Ok,

This is a very interesting test:

AMD's Cool N Quiet is enabled.

Asus's Q-Fan control is disabled.

The result is:

1. The CPU fan is running at maximum speed.

2. The CPU is 4 degrees cooler.

3. The motherboard is 1 degree cooler.

After a few minutes of testing:

Room temperature is: 24.5 degree celcius.

Motherboard temperature is: 43 to 44 degrees.

CPU temperature is: 36 degrees.

CPU Fan is: 3214 RPM.

Chassis fan is: 1196 RPM.

Power fan is: 756 RPM.

The effect of "cool n quiet" is minimal on the motherboard temperature.

At least according to the heat sensor on the motherboard. Don't know yet
where it is and if it's an ok reading.

I am really curious what happens if I manually set the CPU to 1.1 volts and
then play a game...

My questions a

1. Will the game run as smooth as usual ?

2. Will the system still get hot ?

If so that could indicate heat from memory chips and graphics cards and
maybe also from motherboard and a little bit from cpu as well probably...
but should be less..

This is going to be a very interesting test.

I will now enable manual underclock of 1.1 volts.

Disable the cool n quiet feature... not sure if it is necessary for under
clocking but I find out.

Question for the future is:

Is it even possible to run cpu on 0.800 volts ?

What would happen, would system fail to boot ? Hmmm

Interesting.

Bye,
Skybuck.

Fingers crossed

Underclocking is altering the frequency of the processor clock, its
not adjusting voltages !

If you want to underclock then go into the BIOS and change the CPU
frequency.

"Skybuck Flying" wrote in message
...

"Skybuck Flying" wrote in message
...
Also what do these settings do and mean ?

K8 to NB Frequency: 1x - 8x, Auto
K8 to NB LinkWidth: 8/8, 16/16, Auto
SB to NB Frequency: 1x - 8x, Auto
SB to NB LinkWidth: 4/4, 8/8, 16/16, Auto

NB =north bridge.
SB = south bridge.

K8 is probably the processor ?

These settings seem memory and/or bus related ?

Also now that I am discussing bios options...

What is interrupt 19 capture ?

Ok to answer my own question.

Int 19 seems to be boot related.

When enable.. the system could use some other boot rom on some device or
something

http://www.techarp.com/showFreeBOG.a...ng=0&bogno=290

Maybe to test motherboards or so with some external equipment

Bye,
Skybuck =D

Okay. Firsty, are you trying to underclock or lower the voltage in your
rig - you seem to be confusing the two? Under clocking will slow everything
down, under-volting (is that a word?) will reduce the heat output but will
make your PC seriously unstable.

Can you explain exactly what it is you are trying to acheive? Why do you
want to change the settings and what do you expect to gain?

If it is underclocking you want then simply set the overclock feature to
manual or enabled and set the multiplier to half of whatever it should be
e.g. 200 (CPU clock) x 10 (multiplier) = 2000 MHz or 2 GHz. If you set the
multiplier to half, the CPU clock will still be set at 200 so you ram will
run at the same clock speed but your processor will run at half the speed
e.g. 200 (cpu clock) x 5 (mulitplier) = 1000 MHz or 1 GHz. However, you can
expect around half of the performance.

To be honest, whatever you are trying to do, Google is your best bet.

Glennbo

I don't think I can change the multiplier ? Apperently it's locked for this
CPU.

However I read about a trick once...

Lowering the voltage for the processor was supposed to make it run slower...

I was trying to lower the overall motherboard temperature...

Lowering the cpu temperature doesn't effect it that much...

So not much use anyway...

However... maybe I could lower the cpu fan and get less noise..

But then again the cpu fan might be necessary to keep the motherboard cool
as well

Bye,
Skybuck.

Underclocking is altering the frequency of the processor clock, its
not adjusting voltages !

If you want to underclock then go into the BIOS and change the CPU
frequency.

Probably not possible... processor "locked".

I read trick once about lowering voltage would reduce cpu speed..

Apperently not...

Thanks anyway

Bye,
Skybuck.

"Skybuck Flying" wrote in message
...
Underclocking is altering the frequency of the processor clock, its
not adjusting voltages !

If you want to underclock then go into the BIOS and change the CPU
frequency.

Probably not possible... processor "locked".

I read trick once about lowering voltage would reduce cpu speed..

Apperently not...

Thanks anyway

Bye,
Skybuck.
Mutiplyer is locked, but if you reduce FSB by 20%, CPU will run 20%
slower and cooler, plus you can reduce Vcc when CPU running slower. THAT is
what Cool & Quiet does! It Has no effect on motherboard temps or fan speeds.
If you have autofan ON, fan will slow down as CPU is cooler. For Cool &
Quiet to work, you have to have 'minimal power saving' set in Powe Options
in Control Panel.

Mike.

Mutiplyer is locked, but if you reduce FSB by 20%, CPU will run 20%
slower and cooler, plus you can reduce Vcc when CPU running slower. THAT
is
what Cool & Quiet does! It Has no effect on motherboard temps or fan
speeds.
If you have autofan ON, fan will slow down as CPU is cooler. For Cool &
Quiet to work, you have to have 'minimal power saving' set in Powe Options
in Control Panel.

Mike.




I thought on new-er processors you were now able to down multiply?