Really Weird

[Drocona]

Ah I got it

Quote:ACPI, What is ACPI, What does ACPI mean ?

ACPI - Advanced Configuration Power Interface
ACPI (Advanced Configuration Power Interface) refers to a Power Management specification developed by Intel, Microsoft and Toshiba. The specification allows an operating system to control the power distribution to peripherals such as hard drives, it was originally intended for laptops/notebooks where power saving is vital.

Since Windows 98, ACPI has replaced the older APM (Advanced Power Management) specification (used in Windows 95).

ACPI allows the operating system to communicate with the computer's BIOS and instruct the BIOS to power down peripherals, for instance when your computer goes into hibernation mode, the operating system is using the ACPI specification to control the power to the internal components.

That's the thing that limits your FPS.

Quote:How can I disable ACPI?

Depending on your scenario, there's different ways of going about disabling ACPI.

To disable ACPI in the BIOS before you install any operating system:
1. Enter the BIOS setup by pressing "DEL" while booting.
2. Go to "Power Management SETUP".
3. Scroll down to "ACPI Aware O/S".
4. Using the "Page Up/Page Down" set to "No".
5. Save and Exit.

To disable ACPI under Windows 2000 or Windows XP install:
1. Run the Windows 2000/XP Install Setup
2. When you see the message "Press F6 if you want to specify additional mass storage devices....", press "F5"
3. When you get a list of options to choose from, select "Standard PC"

To disable ACPI after Windows 2000/XP is installed.
I do not recommend this, a clean install is always better. But if you still want to do it, here's how:

1. Go to Device Manager and select Computer -> Properties of ACPI PC
2. Click the driver Tab and choose Update Driver. When the wizard gets to the "What do you want the wizard to do?" page select "Display a list of the known drivers..."
3. Then "Show all hardware of this device class"
4. Then select "Standard PC"
5. Reboot the machine.

Be aware that when Windows 2000 restarts it'll redetect most of the hardware in your machine again and reassign IRQ's to devices.

Quote:How can I enable ACPI?

There's two parts to a ACPI system, the BIOS and the operating system with support for ACPI. To enable ACPI on the BIOS, go to the BIOS setup and then to the "Power Management Setup" menu. Set "ACPI Aware O/S" to yes by using Page Up/Down. Then install the OS of your choice.

Not very convenient but it works...

[manofphat]

I think I've tried that F5 during Windows setup before and when everything got installed I lost control of my multiple cores!
Next time I have a KVM-IP switch hooked up to my rig I'll check the BIOS for the Power Management features for sure. Good tip!
I'm gonna have to install XP fresh on my test machine here and try that after-installation solution. I'll let you know how it goes!

Thanks for taking the time to bring me this information Drocona!

[Drocona]

No problem, my pleasure