Nivdia Gt555m

[uptikool]

i am runing a fresh fedora 17 install

i have a lenovo y570 which has 2 GPUS

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Process
or Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device 3981
Flags: bus master, fast devsel, latency 0, IRQ 50
Memory at f1400000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 3000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915

01:00.0 VGA compatible controller: nVidia Corporation Device 0deb (rev a1) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device 3981
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at f0000000 (32-bit, non-prefetchable) [size=16M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
Memory at d0000000 (64-bit, prefetchable) [size=32M]
I/O ports at 2000 [size=128]
Expansion ROM at f1000000 [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidia, nouveau

I need some help in figuring out how i can contol when the nVidia card can be turned on and off when i want it too

thanks