Looking for a computer to play Amnesia!

[Googolplex]

Yes, the first one is a good choice.
But the GeForce GTX 520 is a low-end graphics card.
You will be able to play the game, but it may couldn't be an experience in high quality.
The second number is important, it's a "2". So a GeForce GTX 460 is better than a GTX 520, because of a 6 instead of a 2.
The first number only is the generation of GPU, the second number is the performance class.
But I'm sure the game will work with good FPS, when you disable anti-aliasing, SSAO-Samples and quality and Shadow-quality.
The most challenging setting are the SSAO-Samples. It needs very much performance!

Install latest driver from nvidia and try the game.