It should be fine for Crysis 3 and FarCry 3. It is unknown how much Crysis 3 will depend on the CPU. Crysis 2 did not care at all how powerful the CPU was a long as it did not bottleneck the GPU and was powerful enough to handle all the things the CPU would need to do like physics, AI, logistics, etc.
Far Cry 3 is a different story... As can be seen in the chart below Far Cry 3 is CPU bound. A stock Q9550 @ 2.83GHz and the Radeon HD 7970 it would likely sit between the AMD A10-5500 and the A10-5800k.http://www.techspot.com/review/615-far-cry-3-performance/page6.html
I think Far Cry 3 might have some performance issues since people with powerful CPUs and GPUs have been complaining about low performance. Whether that is by design or non optimized coding is up for debate.