The AMD is the slowest one, although not that much slower than the 4820k, but the AMD consumes a lot more energy. I don't see why the 4820k was recommended at all, the 3770k and 4770k are as fast but consume a lot less energy.

Basic rundown:

4820k fastest 130w power

4770k 5-10% slower --- 84w

3770k 10-15% slower --- 77w

AMD FX8350 10-15% slower --- 200+w (some test show it uses over 250w)

Then there's the 3930k..... it user 130w is about 10 faster then the 4820k, so it is the fastest of all, but...... you need to consider pricing.

The 3930k costs the most, a lot more then the others and the motherboard needed is more expensive as well, I'll put this one on 100% price. Second place is the 4820k, the cpu cost a lot less, but the motherboard is about the same price, this one gets 70%. the 4770k and 3770k are roughly the same price, (3770k a bit cheaper) but the 3770k runs in a less expensive motherboard. The 4770k get's 65% and the 3770k get's 55-60% depending on the motherboard. The AMD FX8350 is the cheapest of all of them, a lot cheaper then the rest, motherboard the same price as the 3770k, it get's 50%

Then there's one more thing to consider..... are you going to overclock at all? If not, drop the k versions and get the regular ones, they are cheaper and run at the same speed if then the k versions onless you overclock.

I guess that's about it, good luck with choosing your cpu :-) Personally I'd go with the 4770(k). Costs vs performance wise the best. Runner up would be the 4820(k) Good performance, but higher price. I don't see the point of paying a lot more for the 3930 at all, it just doesn't offer enough for it's high price.

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Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk