Проверил в старой системе
03:00.0 VGA compatible controller: NVIDIA Corporation G92 [GeForce 9800 GT] (rev a2) (prog-if 00 [VGA controller])
Subsystem: Elitegroup Computer Systems Device 1a0e
Flags: bus master, fast devsel, latency 0, IRQ 42
Memory at dd000000 (32-bit, non-prefetchable) [size=16M]
Memory at b0000000 (64-bit, prefetchable) [size=256M]
Memory at <ignored> (64-bit, non-prefetchable)
I/O ports at 8c00 [size=128]
[virtual] Expansion ROM at c0000000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidia_331, nouveau, nvidiafb
То есть проприетарный драйвер nvidia работал после установки, без удаления свободных драйверов из системы.