Contribution d'origine par : originalmachead ,
You must replace the CPU with only one that was offered as an OEM upgrade by Apple or you'll have EFI problems. ''If you do this you could create and post a guide''. See [http://www.ifixit.com/Answers/View/53213/CPU+upgrade+2.0GHz+to+2.8Ghz+%28+C2D+Extreme+X7900+%29|this thread.] ''If this answer is acceptable '''please remember to return and mark it'''.''