Now I have a Q8200 but I want to upgrade so I don't know what to choose between E8400 or Q9400.The Q9400 has 2.66Ghz and 6 mb cache but the E8400 has 3.0Ghz and 6 mb cache.So does a dual-core CPU @ 3Ghz perform better than a quad-core @ 2.66Ghz keeping in mind that they're both 45nm and the same cache?
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