To give you an idea of the type of performance increases you will see when overclocking the 9800 PE, we have provided some results.
To recap, we were able to obtain a maximum stable core clock speed of 398MHz which is just 18MHz over default (or about a 5% overclock). On the memory side of things we were able to obtain a maximum stable memory clock speed of 365MHz which is 65MHz over default (or about a 22% overclock).
In our first synthetic overclocked benchmark we can see that the overclock provides just over a 16% performance increase which could have been higher if the core overclocked further than it did.
Unreal Tournament 2004
A more realistic benchmark shows us that the overclock only provides us about a 7% increase in performance in a real-world circumstance.
We have seen this before with Doom 3 in the initial stages - it loves fast memory. We can see that we just over a 13% increase in performance which in this case could mean the difference between a playable gaming experience and not.
It would seem Far Cry doesn't thrive on highly clocked memory as much as Doom 3 since we only see about a 6% increase in performance.