Sagi send me the follow regarding the new beta voodoo banshee drivers:

In the banshee.inf file the memory clock setting is set to 110 Mhz by
default. This setting can cause desktop lockup problems. I have found that
changing this setting to 100 instead of 110 fixes the lockup problem.

here is the section from the inf file

OLD INF section

[banshee_SoftwareDeviceSettings]
HKR,, InstalledDisplayDrivers, %REG_MULTI_SZ%, banshee
HKR,, VgaCompatible, %REG_DWORD%, 0
HKR,, UseNonBIOSModeSet, %REG_DWORD%, 1
HKR,, memclocking, %REG_DWORD%, 110


NEW inf section

[banshee_SoftwareDeviceSettings]
HKR,, InstalledDisplayDrivers, %REG_MULTI_SZ%, banshee
HKR,, VgaCompatible, %REG_DWORD%, 0
HKR,, UseNonBIOSModeSet, %REG_DWORD%, 1
HKR,, memclocking, %REG_DWORD%, 100

This one change can fix the desktop lockup problem.

Sagi