These DirectX settings allow you to change some of the DirectDraw and Direct3D video acceleration parameters.

Open your registry and find or create the key below.

Create a new DWORD value for each optional item from the list below and set it to "1" to enable the setting or "0" to disable it.

• DisableAGPSupport - Disable AGP support
• DisableMMX - Disable MMX processor extensions
• DisableWiderSurfaces - Disable Wider Surfaces support
• DisableInactivate - Disable dual-head video card debugging
• EnablePrintScreen - Enable Print Screen capture
• ModeXOnly - Use Mode-X for older video cards
• ShowFrameRate - Display the frame rate (if supported)
• DisableNoSysLock - Disable long-duration locks on video memory
• ForceNoSysLock - Force use of long-duration locks on video memory
• EmulationOnly - Enable software emulation layer for older video cards

Open the [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Direct3D] key and change the value of DisableDP2 to "1" to disable Direct3D, or "0" to enable it.

Open the [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Direct3D\Drivers] key and change the value of SoftwareOnly to "1" to use software emulation or "0" to disable it.

		(Default)	REG_SZ	(value not set)
		DisableAGPSupport	REG_DWORD	0x00000000 (0)
		DisableMMX	REG_DWORD	0x00000000 (0)
		DisableWiderSurfaces	REG_DWORD	0x00000000 (0)
		DisableInactivate	REG_DWORD	0x00000000 (0)
		EnablePrintScreen	REG_DWORD	0x00000001 (1)
		ModeXOnly	REG_DWORD	0x00000000 (0)
		ShowFrameRate	REG_DWORD	0x00000001 (1)
		DisableNoSysLock	REG_DWORD	0x00000000 (0)
		ForceNoSysLock	REG_DWORD	0x00000001 (1)
		EmulationOnly	REG_DWORD	0x00000000 (0)

	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectDraw

Settings:

System Key: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectDraw] Type: REG_DWORD (DWORD Value) Value: (0 or 1)

Warning: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.

Restart Windows for the change to take effect.

 

Windows may stop responding when you use an Accelerated Graphics Port (AGP) program with an AMD Athlon processor. This is due to the memory allocated by the video adapter driver becoming corrupted.

  This behavior is known to occur with Nvidia GeForce 256 and Matrox G400 video adapters on computers with AMD Athlon processors. This behavior is not specific to any particular video adapter type.

Open your registry and find the key below.

Create a new DWORD value called "LargePageMinimum" and set it to equal "0xffffffff" (or 4294967295 in decimal).

		(Default)	REG_SZ	(value not set)
		LargePageMinimum	REG_DWORD	0xffffffff (4294967295)

	HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memo...

Settings:

System Key: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\ Memory Management] Name: LargePageMinimum Type: REG_DWORD (DWORD Value) Value: 0xffffffff (4294967295 decimal)

Warning: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.

Restart Windows for the change to take effect.

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