As you can see from both the chart and the table below, World In Conflict scales a bit - but only a bit - with processor speed at 800x600 very low detail only. The higher resolution results are within experimental error of each other, so that tells us that World In Conflict is VERY GPU limited.
Given a good enough GPU, the Phenom 9900 will run World In Conflict well enough.
2.6Ghz Avg
2.6GHz Min
2.6GHz Max
wic 8vlo
139
74
303
wic 10h
30
17
53
wic 12h
23
13
37
3Ghz Avg
3GHz Min
3GHz Max
wic 8vlo
143
82
312
wic 10h
28
15
51
wic 12h
21
11
36
Power Consumption
The Phenom 9900 is not exactly a miser when it comes to power consumption - the Xeon X3210 uses quite a bit less juice.
Unfortunately we don't have power consumption figures for the QX6700.