What CPU/GPU runs the game with at least 120fps?

[Assirra]

You really don't need to spend lots of money or even get fooled by building what people call a "future proof" gaming pc nowadays, Especially now that Gsync monitors are out.
I'd say 3570k + GTX780 would perform really well with any G-sync monitor at 60fps and you don't have to worry about tearing and such at all for at least another Generation.

Goodluck.

You talk about not spending a lot of money yet we see a 780 and a gsync monitor...
What do you call spending a lot of money i am wondering then, triple SLI and a 4k monitor?

[Tiggy]

This greatly depends on the content/media that is being viewed. With something like gaming, the average person isn't going to notice.

I can see the difference between 60 and 80 easily. It's around 90 that it skill feels the same.

[Fengel]

Thank you all for your replies, now I have a better idea of what I'll need to reach 120fps (or at least to get close to that framerate).
To answer a question in the first page of the thread, "Why would I want 120fps?", it's mainly because of this:
http://www.blurbusters.com/zero-motion-blur/video/
Strobing the backlights of a 120hz (or faster) 3D LCD screen, the movement becomes as fluid as on you could see on a CRT screen.
Quoting a description from their website on how strobing works:

The backlight is turned off while waiting for pixel transitions (unseen by human eyes), and the backlight is strobed only on fully-refreshed LCD frames (seen by human eyes). The strobes can be shorter than pixel transitions, breaking the pixel transition speed barrier! In addition, it eliminates the sample-and-hold effect.

[Fengel]

Here are some FAQ: http://www.blurbusters.com/zero-motion-blur/lightboost-faq/

And here some comparison shots between a 60hz monitor, a 120hz monitor and a strobed 120hz monitor: http://www.blurbusters.com/faq/60vs120vslb/

Since I switched to LCD monitors some years ago due to CRT straining too much my eyes, I always missed CRT's ability to show fluid motion without stuttering or blurring: this strobing is the solution. The last time I saw something similar, it was on my old CRT monitor 1280x1080.

If you decide to try it, here you can find some tests to run: http://www.testufo.com/