Which one of these CPU's is best?

I wanna compare three CPU's on the basis of performance. These are:

1.Core 2 Duo E7300 aka Wolfdale
2.AMD Phenom II X2 550 aka Callisto
3.AMD Athlon II X2 245 aka Regor


Q1.Which one of these performs the best on stock speeds?
Q2.Which one performs the best at overclocked speeds?
Q3.I have the wolfdale . How does it compares to the rest two?

thanks for your time and valuable comments.

They're all very close, but in performance for stock I'd say it goes Phenom II, E7300, Athlon II.... overclocked, I dunno. E7300 might overtake the Phenom II.

1. The 550BE would be the best choice

2. 550BE would still perform better OC

3. e7300 would trail the 550BE. I've done testing with AthlonII 250 and E7300, it is a toss up. E7300 better at synthetics and benchmarks, while the AthlonII little better in some games.

Yes sir.... the Callisto 550 is a dual core @ 3.1Ghz.... but I have mines @ 3.9Ghz and it still has more headroom...

If you already have an E7300, just overclock and have fun with it....

If you are in the mood of upgrading you should be looking at quads and not dual cores.....

Hmmmmmm.....
How better would be the i3 than duo's and Phenom II's?

Exactly^

You got intel socket 775, unless you got some $$$ stupid question.

i3 will require a new setup as well. Socket 1156, and ddr3 ram.