Let's consider if you were able to increase the speed from 2700 to 3200+. Even at that ideal result, the game is going to run imperceptibly faster. I changed from a 3200+ to an Opteron 175 dual processor and only had modest (but very worthwhile) improvements. I recommend either replacing the processor or motherboard.
On the other hand, if you are looking at that for your eventual move anyway, then what's the harm of harm to your microprocessor? I'd say it's time to learn overclocking! Insane speed ahead! You have nothing to lose but a worthless processor.
I am assuming you can afford to upgrade, of course.
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