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Install another revision of dolphin3.0 or any revision you prefer and try again.

How are you overclocking then? And how is it failing? Are you going into the bios or software overclocking? Is the computer unstable with overclocking? Does your mobo support OC? I need more info....

Try overclocking it to around 4.2 to 4.4ghz. At that speed you will run every game perfect. It could be your gpu bottlenecking your cpu. Also, what are the rest of your system specs and dolphin...