Computer specifications for Unity 3

Unity Engine
1

What are the optimal specifications for a computer running a graphically demanding standalone Unity project?

What is the bottleneck in the case of Unity, CPU, GPU and RAM-wise?

Would a Core 2 Duo suffice with a high-end gfx card, or would for example a Intel i7 be a better performer?

2

Its still the same as right now unless you own unity pro and go with deferred rendering path in which case it depends on what you push in and is largely gpu bound then, naturally with the common “64bit os and 6GB+ RAM being better” so you can use 4GB exclusively for unity