Phenom II X4 and CrossFireX Tested
 

We set out to answer the question, “Is the Phenom II competitive with a similar Intel Platform in CrossFireX?” Based on our results today, we would have to answer a resounding yes to that question.<br>
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It’s not as balanced as the Core i7 920 or even Core 2 Quad Q9550 in a few games, but it does not embarrass itself either. In fact, we think it put up a very good fight and stood its ground with the Q9550. Compared directly to the Q9550, the Phenom II X4 940 is clearly a strong competitor. It had better average frame rates in CrossFire mode than the Q9550 in three titles, tied in one, and finished behind the Q9550 by about 2%~7% in the other three games.<br>
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When it came to actual game play experiences, we thought the Phenom II 940 was clearly the better choice in Company of Heroes: Opposing Fronts and Crysis Warhead due to minimum frame rate advantages and fluidity of game play. In the five other titles, we could not tell any real differences in the quality of game play between the Phenom II 940 and Core 2 Quad Q9550. Except for Far Cry 2 where we could raise the graphic quality settings without affecting game play, the i7 platform was no different than our two other solutions.

http://www.anandtech.com/mb/showdoc.aspx?i=3506