Is my computer able to run The Witcher 2 at high settings and high fps with my current rig?

From what I can tell, the Witcher 2 is a highly praised game. Apparently it requires a beefy computer to run it. I was wondering if my pc can run the game at pretty high settings with decent fps. Specs: intel core 2 quad cpu q8300 @ 2.50GHz / Memory (RAM) 4.00 GB / system type 32-bit / NVIDIA gts 450 / windows vista