Model A1312 / Mid 2010 / 3.2 GHz Core i3 or 2.8 & 3.6 GHz Core i5 or 2.93 GHz Core i7

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Core i3 to Core i7 CPU Fan running at 4000rpm

Hi, i made the upgrade from Intel® Core™ i3-550 Processor (4M Cache, 3.20 GHz) to Intel® Core™ i7-860 Processor (8M Cache, 2.80 GHz), and now my iMac (Middle 2010) is so slow, i dont know whats going on, i read something about the FCLGA1156 and im a little bit confused.. so, should i go back to my core i3? or can i do something for the upgrade? thanks.

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I would run Bench marks on both processors. Download Geekbench http://browser.primatelabs.com/mac-bench...

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Deck the Halls
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Have you checked - tried an EFI update?

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http://browser.primatelabs.com/geekbench... thats the result of my imac, i reinstall mountain lion two days ago.. but i think it should be better in the bench.

The EFI Update is ok, is the one that i already have...

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