Checked out minimum system requirements for the game.. your CPU is fine and your FX2700 is marginally better than minimum required GPU, so you should be fine.
The Quadro FX 4500 has 256 MB more video memory than the GeForce 7800 GT, so is likely to be slightly better at displaying game textures at higher resolutions. This is supported by the fact that the Quadro FX 4500 also has superior memory performance overall.
The Quadro FX 4500 has 4.8 GB/sec greater memory bandwidth than the GeForce 7800 GT, which means that the memory performance of the Quadro FX 4500 is marginally better than the GeForce 7800 GT.