Mark Fox send words that a new version of NVTurbo is out now.
What is NVTurbo?
Nothing special if you normally use PowerStrip, but power users who like their "tweakers" lean and mean may find this little 120k program of interest. It is specifically written to handle multiple GeForce cards under XP, using the Detonator IV drivers, but should work with most older NVidia cards and drivers as well. Grab it from MaxReboot here.