I am running two EVGA 8600 GTS graphics cards. I tried using the nvidia-settings program and using the coolbits option I was able to overclock my first graphics card. However, in the xorg.conf file my second graphics card doesn't even show up so I can't add the coolbits option to it (my second card does show up when I'm in the nvidia-settings program though).

I've also tried using the nvclock program in konsole to overclock my second video card. I get the following results:

"root@bt:~# nvclock -s --speeds
Card: nVidia Geforce 8600GTS
Card number: 1
Mode GPU Clock Memory Clock
Coolbits 2D: 762.000 MHz 1008.000 MHz
Coolbits 3D: 762.000 MHz 1008.000 MHz
Current: 756.000 MHz 1007.996 MHz

Card: nVidia Geforce 8600GTS
Card number: 2
Mode GPU Clock Memory Clock
Coolbits 2D: 762.000 MHz 1008.000 MHz
Coolbits 3D: 762.000 MHz 1008.000 MHz
Current: 675.000 MHz 1007.996 MHz"

My second card shows 762MHz in Coolbits, but its actual current clock will not increase to that. Google yields plenty of results on how to overclock 1 card, but I can't seem to find how to overclock both. I'm really hoping to overclock them both to help boost my PMK/s up as much as possible. Does anyone know how or have any suggestions?