Official GCPUID website support, updates and feedback:
http://www.thecoolest.zerobrains.com/forums/index.php?c=7

There are several shortcuts in GCPUID:

F5 is to manually refresh everything on the screen.
Auto-Refresh which happens every 5 seconds refreshes only the current CPU speed.

F6 is to save a bitmap of the program.

F7 is to save a register dump txt file.

F9 is to get into the FID & VID window. (Read further).
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GCPUID also supports these command line commands:

-txtdump:

This command will create a register dump text file, it'll be named Output.txt and will be placed
either in the GCPUID.exe folder or the folder you clicked on the shortcut.
(Basically you can set that folder by yourself, by editing the "Start in:" field in the properties
of the shortcut)

-ghost:

This command will run the program and immediately shut it down after it all the other commands,
like if you want to change multiplier or voltage on startup of windows you can use this command
so the program will only launch, change to the settings you want it to change and shut down.

-multi=:

This command will let you set a multiplier of your choice (as long as its supported by the
CPU) at launch of the program (for information on how to use it, read on)

-volt=:

This command will let you set any voltage (as long as its supported by the CPU) at launch
of the program (for information on how to use it, read on)
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!!!Disclaimer!!!
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This program can change the CPU multiplier and voltage on AMD Athlon 4/Mobile AthlonXP,
Athlon64 and Athlon 64-FX processors, it can also do this on Intel Pentium M chips.
***THIS FEATURE WILL MOST LIKELY CAUSE A LOCKUP IF USED ON A nForce2 chipset + XP-M (Mobile Athlon XP) CPU!!!***
Although it has been tested on all of those processors and proved to be working, I will
not take any responsibility for any damage that was caused by the use of this program.
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If you have one of the processors mentioned above you can use this program to change the
multiplier and voltage settings of your CPU.
There are two ways of doing that:

1. Run the program click on the Extras menu then chose FID & VID Control, or just hit F9.
There you will be able to manually change the settings.

2. add -multi= and -volt= commands:
the syntax is like this: -multi=(12.5) or -volt=(1.85). It is very important to keep the syntax
correct! Do not add any unnecessary '0's after a decimal point, but do use 0 if you want to
set voltage of 0.975 or lower (something like this: -volt=(0.975)), do not add spaces between
the -volt=/-multi= command and the brackets! That is also very important.

Example: "C:\Program Files\GCPUID\GCPUID.exe" -multi=(12.5) -volt=(1.85) -ghost

Note: When doing this on an Athlon4/Mobile AthlonXP you will see two "Off" values, I have not tested
them, and I'm not sure what they do. I wouldn't recommend using them as it might lead to unexpected
results and/or loss of data.

Note2: After some researching and testing, it has become clear that the nForce/nForce2 chipset by
nVidia doesn't support this feature. If you try to change the multiplier/voltage of your CPU,
it will lead to immediate lock-up of the system and loss of all your unsaved data.

Maximum and minimum values:
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For K7 (AthlonXP):

Min Multiplier: x3 (if you're running on a 133MHz bus x4 is minimum, if you set x3 the machine
will most likely lock up)
Max Multiplier: x24 (Or whatever is set by AMD)

Min Voltage: 0.925v 
Max Voltage: 2.000v (Or whatever is set by AMD)
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For K8 (Athlon64/FX):

Min Multiplier: x4
Max Multiplier: x25 (Or whatever is set by AMD)

Min Voltage: 0.800v
Max Voltage: 1.550v (Or whatever is set by AMD)
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For Pentium M (Banias & Dothan):

Min Multiplier: x6 (Or whatever is set by Intel)
Max Multiplier: Set by Intel

Min Voltage: 0.700v (Or whatever is set by Intel)
Max Voltage: 1.708v (Or whatever is set by Intel)
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